By itself, the iPhone brought in enough revenue last year ($155 million) to place fifth on theFortune 500 list.

That's incredible.

And I think you mean $155 billion with a b.

It just might be the most successful product of all time. 

iPhone is bigger and growing faster than all of Google, Microsoft, and Amazon.

http://pandawhale.com/post/35572/apple-iphone-business-is-bigger-and-growing-faster-than-all-of-google-microsoft-and-amazon

Apple passed 1 billion iPhones in July. 

http://www.theverge.com/2016/7/27/12302542/apple-billion-iphones-sold