Facebook has 7,185 employees as of June 30th, 2014. Assuming the average salary is $100,000 (They aren't all developers). It means that facebook makes enough money to pay all it's employees for the year in 22 and a half days.
That number seems relatively cheap for me. I guess it's a little over that if it's worldwide, no? Not to mention related values like stock prices, etc...
sillysaurus3 said every 4 minutes, meaning the salary would be somewhere between $80k-$90k, which is pretty reasonable.
I need to give TechCrunch the credit for the number $22,453:
The average yearly programmer salary is generated about every four minutes. Neat.