this is the number of total address
115,792,089,237,316,195,423,570,985,008,687,907,852,837,564,279,074,904,382,605,163,141,518,161,494,336 (yes it is a copy paste).
Despite the hypothesis can't be totally excluded, it's a very tiny possibility to generate one of the same address used by satoshi nakamoto.
For sure we can speculate about a possible backup of his work, but as I said, it's a pure speculation.
My 2 cents, Probably if some one will be ever able to sign a message from his address we will see something "really big" (both in negative or positive meaning
).