How old can someone get?

I am in the middle of LO49 right now and read the first conversation between Obel and Sunny. That made me question the life expectancy in the world.

Because there are old people from the first generation that are still normal humans that means they have not yet seen any actual signs of how long someone as a Awakened, Ascended, Transcendent etc can become.

Without any spoilers please, will this be answered? In the Second Nightmare there was a mention of a Saint dying from old age if I recall correctly, but no mention at what age.