51516560512 has 32 divisors (see below), whose sum is σ = 103162462380. Its totient is φ = 25624805376.

The previous prime is 51516560507. The next prime is 51516560527. The reversal of 51516560512 is 21506561515.

It can be written as a sum of positive squares in 2 ways, for example, as 49237834816 + 2278725696 = 221896^2 + 47736^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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, 1017973 + ... + 1067380.

Almost surely, 2^51516560512 is an apocalyptic number.

It is an amenable number.

51516560512 is an abundant number, since it is smaller than the sum of its proper divisors (51645901868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51516560512 is a wasteful number, since it uses less digits than its factorization.

51516560512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085560 (or 2085548 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 51516560512 in words is "fifty-one billion, five hundred sixteen million, five hundred sixty thousand, five hundred twelve".