51520716604 has 36 divisors (see below), whose sum is σ = 107439559920. Its totient is φ = 21541759680.

The previous prime is 51520716547. The next prime is 51520716623. The reversal of 51520716604 is 40661702515.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3197584 + ... + 3213655.

It is an arithmetic number, because the mean of its divisors is an integer number (2984432220).

Almost surely, 2^51520716604 is an apocalyptic number.

It is an amenable number.

51520716604 is an abundant number, since it is smaller than the sum of its proper divisors (55918843316).

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

51520716604 is a wasteful number, since it uses less digits than its factorization.

51520716604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6411298 (or 6411289 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 51520716604 in words is "fifty-one billion, five hundred twenty million, seven hundred sixteen thousand, six hundred four".