51147712564 has 12 divisors (see below), whose sum is σ = 96393766084. Its totient is φ = 23606636544.

The previous prime is 51147712559. The next prime is 51147712619. The reversal of 51147712564 is 46521774115.

It can be written as a sum of positive squares in 2 ways, for example, as 11824822564 + 39322890000 = 108742^2 + 198300^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51147712564.

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, 491804877 + ... + 491804980.

Almost surely, 2^51147712564 is an apocalyptic number.

It is an amenable number.

51147712564 is a deficient number, since it is larger than the sum of its proper divisors (45246053520).

51147712564 is a wasteful number, since it uses less digits than its factorization.

51147712564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983609874 (or 983609872 counting only the distinct ones).

The product of its digits is 235200, while the sum is 43.

The spelling of 51147712564 in words is "fifty-one billion, one hundred forty-seven million, seven hundred twelve thousand, five hundred sixty-four".