Question

What is 100,000,000!

Hint: ! is factorials

Answer 1

It would be a HUGE number - it is 1,000,000 * 999,999 * 999,998 * 999,997 all the way down to 1

Answer 2

The Scottish mathematician Stirling figured out a way to approximate factorials.
Here is what Wikipedia says: http://en.wikipedia.org/wiki/Stirling's_approximation

Answer 3

Stirling's approximation is
n! ~ sq root (2*PI*n) * (n/e)^n
for 100,000,000

100,000,000! ~ (2*PI*100,000,000) * (100,000,000/e)^100,000,000

where e = 2.71828