51656510113 has 16 divisors (see below), whose sum is σ = 55801105920. Its totient is φ = 47536511616.

The previous prime is 51656510111. The next prime is 51656510137. The reversal of 51656510113 is 31101565615.

51656510113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51656510113 - 2¹ = 51656510111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51656510111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12019381 + ... + 12023677.

It is an arithmetic number, because the mean of its divisors is an integer number (3487569120).

Almost surely, 2^51656510113 is an apocalyptic number.

It is an amenable number.

51656510113 is a deficient number, since it is larger than the sum of its proper divisors (4144595807).

51656510113 is a wasteful number, since it uses less digits than its factorization.

51656510113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6936.

The product of its (nonzero) digits is 13500, while the sum is 34.

The spelling of 51656510113 in words is "fifty-one billion, six hundred fifty-six million, five hundred ten thousand, one hundred thirteen".