51111006611156 has 12 divisors (see below), whose sum is σ = 89444336216340. Its totient is φ = 25555481977920.

The previous prime is 51111006611149. The next prime is 51111006611167. The reversal of 51111006611156 is 65111660011115.

It can be written as a sum of positive squares in 2 ways, for example, as 22136836800400 + 28974169810756 = 4704980^2 + 5382766^2 .

It is a super-2 number, since 2×51111006611156² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 858776 + ... + 10146896.

It is an arithmetic number, because the mean of its divisors is an integer number (7453694684695).

Almost surely, 2^{51111006611156} is an apocalyptic number.

It is an amenable number.

51111006611156 is a deficient number, since it is larger than the sum of its proper divisors (38333329605184).

51111006611156 is a wasteful number, since it uses less digits than its factorization.

51111006611156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10663834 (or 10663832 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 35.

The spelling of 51111006611156 in words is "fifty-one trillion, one hundred eleven billion, six million, six hundred eleven thousand, one hundred fifty-six".