The music mogul has been told his life expectancy by scientists and doctors who ran tests on his blood, and if he avoids unfortunate accidents, he'll live a long life well into his nineties.
He said: "I had the DNA test done in LAwhich predicts when you're going to die. They take your blood and DNA, then give you back a sheet of paper which says 'We think you're going to be alive until xxxx'.
"Obviously it doesn't take account of the fact you might get hit by a bus tomorrow, but I got told I'd die aged 95 - which is about as good as you can expect."
Simon, 55, welcomed 19-month-old son Eric Cowell into the world with Lauren Silverman, 38, last year and credits being a dad for his prolonged life-span.
He added: "I think a lot of it is down to having a family now, and a lack of stress. I've learned to deal with stress much better now, things don't bother me in the way that they once used to."
Meanwhile, the talent show boss - whose mum Julie died aged 89 and dad Eric aged 81 - reccommends "getting checked" over by doctors to keep the mind at ease.
Simon told the Daily Mirror: "I'm a great believer in getting checked out because if you know you're OK, you actually feel better; your mind plays a big part of it.
"I get everything checked out twice a year and so far, considering every thing I've done, I've been lucky and had no scares.
"My heart, my lungs, my blood - they've all been checked. I remember one of the doctors almost being disappointed when he showed me the results because he couldn't wait to tell me what smoking was doing to me. But there was nothing there."
