51656765411187 has 12 divisors (see below), whose sum is σ = 74620872713400. Its totient is φ = 34435284424128.

The previous prime is 51656765411101. The next prime is 51656765411197. The reversal of 51656765411187 is 78111456765615.

It is a happy number.

51656765411187 is a `hidden beast` number, since 5 + 1 + 6 + 5 + 6 + 7 + 6 + 541 + 1 + 1 + 87 = 666.

It is not a de Polignac number, because 51656765411187 - 2⁸ = 51656765410931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51656765411197) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213137437 + ... + 213379662.

It is an arithmetic number, because the mean of its divisors is an integer number (6218406059450).

Almost surely, 2^{51656765411187} is an apocalyptic number.

51656765411187 is a deficient number, since it is larger than the sum of its proper divisors (22964107302213).

51656765411187 is a wasteful number, since it uses less digits than its factorization.

51656765411187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426530562 (or 426530559 counting only the distinct ones).

The product of its digits is 42336000, while the sum is 63.

The spelling of 51656765411187 in words is "fifty-one trillion, six hundred fifty-six billion, seven hundred sixty-five million, four hundred eleven thousand, one hundred eighty-seven".