What is 4.6 billion years in seconds?

Answer 1

Well, honey, 4.6 billion years is equivalent to around 145,680,000,000,000 seconds. That's a whole lot of ticking on the clock, darlin'. Hope you didn't plan on counting every single one of those bad boys yourself!

Answer 2

145 quadrillion seconds, approx.

Since the number of years is given to 2 significant digits, any precision greater than 3 significant digits is pointless.