How Many Seconds?

Hi I'm Will. I was interested in how many seconds were in different periods of time. So I figured it out.

1 minute = 60 seconds
1 hour = 3,600 seconds
1 day = 8,640 seconds
1 week = 604,800 seconds
1 year = 31,556,926 seconds
5 years = 157,784,630 seconds
10 years = 315,569,260 seconds
50 years = 1,577,846,300 seconds
100 years = 3,155,692,600 seconds
1,000 years = 31,556,926,600 seconds
10,000 years = 315,569,260,000 seconds
100,000 years = 3,155,692,600,000 seconds

WOAH!

What do you notice? Do you see any patterns? How did I figure this out?