5555555555555 is nontrivially palindromic in base 10.
It is a cyclic number.
It is a nude number because it is divisible by every one of its digits.
5555555555555 is a nontrivial repdigit in base 10.
It is a plaindrome in base 10.
It is a nialpdrome in base 10.
It is a zygodrome in base 10.
It is an upside-down number.
Almost surely, 25555555555555 is an apocalyptic number.
5555555555555 is a wasteful number, since it uses less digits than its factorization.
5555555555555 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 265371790.
The spelling of 5555555555555 in words is "five trillion, five hundred fifty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-five".