51164536516 has 6 divisors (see below), whose sum is σ = 89537938910. Its totient is φ = 25582268256.

The previous prime is 51164536487. The next prime is 51164536547. The reversal of 51164536516 is 61563546115.

It can be written as a sum of positive squares in only one way, i.e., 30628500100 + 20536036416 = 175010^2 + 143304^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6395567061 + ... + 6395567068.

Almost surely, 2^51164536516 is an apocalyptic number.

It is an amenable number.

51164536516 is a deficient number, since it is larger than the sum of its proper divisors (38373402394).

51164536516 is a wasteful number, since it uses less digits than its factorization.

51164536516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12791134133 (or 12791134131 counting only the distinct ones).

The product of its digits is 324000, while the sum is 43.

The spelling of 51164536516 in words is "fifty-one billion, one hundred sixty-four million, five hundred thirty-six thousand, five hundred sixteen".