hw long did lane been alive~XD

Lane calculated how long he has been alive, and the result was:

I was born on a Friday and since my birthday...
I've been living for 18 years
I've been living for 228 months
I've been living for 6,938 days
I've been living for 166,522 hours
I've been living for 9,991,364 minutes
I've been living for 599,481,896 seconds
My heart has beaten more than 699,395,480 times!