Interesting Number - 2,147,483,646

The YouTube video Gangnam Style has forced YouTube to upgrade their viewing statistics to handle 64 bit numbers.

(The number of views for the video steadily increased since its release in 2012, until it hit a critical 2,147,483,647. Why critical? Well, the largest number that can be represented by a 32-bit integer is 2,147,483,647.

As a result, YouTube have upgraded their view counter to handle 64 bit integers, which means that they can sit back and relax, unless the video clocks up 9,223,372,036,854,775,808 views. 

There's not much chance of that, because every human being on earth would have to watch it 1.29 billion times to reach that number.)