What comes after quadrillion and after that on up the scale?

Matthew_07

Quadrillion: number of zeroes: 15 Quintillion: number of zeroes: 18 A more complete list can be found here: http://www.jimloy.com/math/billion.htm Dec 01 08, 9:06 AM

IcrPortugal

I know that a googol is a 1 with 100 zeros behind it. Dec 01 08, 10:01 AM

looney_tunes

And a googolplex is 1 followed by a googol of zeroes, which is a ridiculously large number. "Scientific notation" is a more efficient way of conveying large numbers, especially given the debate over the definition of a billion (1000 million or a million million, depending on where you are). http://en.wikipedia.org/wiki/Scientific_notation Dec 01 08, 1:23 PM

author

Note also that for some reason there are two sets of words for large numbers. So, for example, a trillion in the US is a billion here in Europe. (Maybe the British have changed to the American usage, I am not sure). Dec 01 08, 4:08 PM

Baloo55th

As usual here, we use both systems. Currently, a billion can be either the British or American one. Depends on how you feel, and what you're trying to prove. (We've never accepted the German milliard or the Indian crore as units - we do have limits.) Dec 01 08, 4:54 PM