The real question is...
When did he get his AARP card? Was he 50 or did he have to wait until he was 325?
Damn straight! I don't want to have to pay for someone's Social Security for 800 years, instead of 20 or 30....though in all honesty, it might be pretty boss to have a retirement that long.
The question I have for all of you how ask this question is- Does it matter?
But to answer your question... he might have...but its very unlikely. The MOST likely solution instead of this being literal or this being totally fabricated would be that they were really a dynasty of people that beget another important dynasty of people way later....and when someone is said to have had a child, it was really the ultimate ancestor of what would eventually become the next bloodline... though I believe that the story of Ab(ra)ham is true...I mean, at least it is in the realm of physical reality... unless, of course, the people between Adam and Noah was the entire Atlantis thing where people had really good life extending drugs...and the entire fact that maximium lifespans may soon start to increase may mean that we are either entering the end times or perhaps a new time revelations.