SAN FRANCISCO (AP) — Apple’s market value surpassed $700 billion in Tuesday trading, an unprecedented milestone among U.S. companies.

Shares backtracked in the afternoon, closing down $1.03 at $117.60 — leaving Apple up 47 percent this year with a still-staggering market value of $690 billion. Exxon Mobil Corp. is a distant second with a market value of about $400 billion.

The iPhone and iPad maker is worth so much that it stretches the imagination.

Consider the buying power of $700 billion:

— It could buy 935 million models of the iPhone 6 Plus with 16 gigabytes of storage. That would be nearly enough to distribute Apple’s latest gadget du jour to everyone living in North America and Europe. Or you could just buy 1.4 billion units of the 16GB iPad Air 2, enough to give Apple’s latest tablet to everyone in China.

— It could pay for Thanksgiving dinner — and not just for the Americans who celebrate it. The American Farm Bureau estimates the average Thanksgiving dinner with all the fixings for 10 people will cost $49.41 this year. At that price, $700 billion would cover 14.2 billion Thanksgiving meals. That’s twice the world’s population.

— It could pay for the annual tuition for 15.5 million students at Stanford University, Silicon Valley’s hub of higher education and the alma mater of many Apple engineers. Stanford estimates its tuitions and fees will cost each student $45,201 during the current school year.

— It could pay for the average annual salary of 146,000 software engineers for the next 40 years, based on the average compensation data that Apple’s own engineers submitted to the company-tracking service Glassdoor.com. Apple’s software engineers currently make slightly more than $119,000 annually, according to the website.

— It could fill the gas tanks of every driver in the U.S. for the next 22 months, based on the current average price of $2.81 per gallon, according to the American Automobile Association. The federal government estimates that the country burns through 135.5 billion gallons of gas annually, or about 371 million gallons per day.

— It could buy every team in the National Football League, Major League Baseball, National Basketball Association and National Hockey League and still have nearly $600 billion left over, based Forbes’ latest estimates of the franchise values in each of the major professional sports leagues. With the remaining money, all 750 players in Major League Baseball could be paid the same $325 million, 13-year contract that the Miami Marlins just awarded Giancarlo Stanton. Even after that spending spree, there would still be about $350 billion left in the kitty, plenty to build a new stadium or arena for every team in the NFL, MLB, NBA and NHL.

— It could pay for the next 46 Summer Olympics, based on the estimated cost of $15 billion for staging the event in London during 2012. But the money would only be enough to cover the next 13 Winter Olympics, based on the $51 billion that it took to pull off that even nine months ago in Russia.

— It would be enough to buy all of the world’s publicly traded airlines, and still have about $300 billion left over to pay for bag fees, seat upgrades and in-flight snacks.

— Or you could just buy 574 billion pounds of apples.

__

AP Business Writers Joh Fahey and Scott Mayerowitz contributed to this story.