51111005600556 has 96 divisors (see below), whose sum is σ = 146180608761600. Its totient is φ = 15314158949760.

The previous prime is 51111005600521. The next prime is 51111005600573. The reversal of 51111005600556 is 65500650011115.

It is a happy number.

51111005600556 is a `hidden beast` number, since 51 + 1 + 1 + 1 + 0 + 0 + 56 + 0 + 0 + 556 = 666.

It is a super-2 number, since 2×51111005600556² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51111005600556.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241595010 + ... + 241806473.

It is an arithmetic number, because the mean of its divisors is an integer number (1522714674600).

Almost surely, 2^{51111005600556} is an apocalyptic number.

It is an amenable number.

51111005600556 is an abundant number, since it is smaller than the sum of its proper divisors (95069603161044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51111005600556 is a wasteful number, since it uses less digits than its factorization.

51111005600556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483401596 (or 483401588 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 51111005600556 in words is "fifty-one trillion, one hundred eleven billion, five million, six hundred thousand, five hundred fifty-six".