Large numbers are interesting. The following quote about a hedgehog sneezing is a good example. The article at the link uses that as a starting point and goes large. Really large. Makes the brain hurt a bit to try and grasp it and doesn’t really serve any useful purpose outside of math research…but it is an interesting read if you can make it through.

A recent Mega Millions lottery had 1-in-175,711,536 odds of winning. To put those chances in perspective, that’s about the number of seconds in six years. So it’s like knowing a hedgehog will sneeze once and only once in the next six years and putting your hard-earned money down on one particular second—say, the 36th second of 2:52am on March 19th, 2017—and only winning if the one sneeze happens exactly at that second.
From 1,000,000 to Graham’s Number — Wait But Why
From a different article about big numbers — but much easier to understand big numbers, a humorous use of Sour-Patch Kids:
And in a night fraught with moments of self-loathing, carefully placing 50 eXtreme Sour Patch Kids on top of another 50 eXtreme Sour Patch Kids, alone at 2am, was the low point. Moving on—
What does A Quadrillion Sour Patch Kids Look Like?