How big is a MO ?

With the advent of 64-bit machines, the largest positive integer that can be represented is

9223372036854775807

or: nine quintillion two hundred twenty-three quadrillion three hundred seventy-two trillion six billion eight hundred fifty-four million seven hundred seventy-five thousand eight hundred seven.

The handy name for this staggering integer is one "MO". To help internalize how big a MO really is, here are a few interesting relationships:

MO millimeters = one light-year
MO square inches = approximate surface area of Neptune
MO seconds = 20 times the age of the universe
MO M&M's = 9 trillion tons

If everyone on the planet each lived 70 years and ate one M&M every second for their entire life, we'd consume 1 MO of M&M's.