51111110111056 has 40 divisors (see below), whose sum is σ = 99078488213760. Its totient is φ = 25542469392384.

The previous prime is 51111110111041. The next prime is 51111110111063. The reversal of 51111110111056 is 65011101111115.

It is a super-2 number, since 2×51111110111056² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51111110111056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824115760 + ... + 824177776.

It is an arithmetic number, because the mean of its divisors is an integer number (2476962205344).

Almost surely, 2^{51111110111056} is an apocalyptic number.

It is an amenable number.

51111110111056 is a deficient number, since it is larger than the sum of its proper divisors (47967378102704).

51111110111056 is a wasteful number, since it uses less digits than its factorization.

51111110111056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87571 (or 87565 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 25.

The spelling of 51111110111056 in words is "fifty-one trillion, one hundred eleven billion, one hundred ten million, one hundred eleven thousand, fifty-six".