51957602320 has 40 divisors (see below), whose sum is σ = 130093845336. Its totient is φ = 19184345088.

The previous prime is 51957602317. The next prime is 51957602327. The reversal of 51957602320 is 2320675915.

It can be written as a sum of positive squares in 4 ways, for example, as 7418032384 + 44539569936 = 86128^2 + 211044^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (51957602327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24978577 + ... + 24980656.

Almost surely, 2^51957602320 is an apocalyptic number.

It is an amenable number.

51957602320 is an abundant number, since it is smaller than the sum of its proper divisors (78136243016).

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

51957602320 is a wasteful number, since it uses less digits than its factorization.

51957602320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49959259 (or 49959253 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 40.

The spelling of 51957602320 in words is "fifty-one billion, nine hundred fifty-seven million, six hundred two thousand, three hundred twenty".