55111311311155 is nontrivially palindromic in base 10.
It is a self number, because there is not a number n which added to its sum of digits gives 55111311311155.
It is an unprimeable number.
Almost surely, 255111311311155 is an apocalyptic number.
55111311311155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.
55111311311155 is a wasteful number, since it uses less digits than its factorization.
55111311311155 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 382014547.
The spelling of 55111311311155 in words is "fifty-five trillion, one hundred eleven billion, three hundred eleven million, three hundred eleven thousand, one hundred fifty-five".