51865908320 has 48 divisors (see below), whose sum is σ = 122596059600. Its totient is φ = 20735721984.

The previous prime is 51865908319. The next prime is 51865908343. The reversal of 51865908320 is 2380956815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233531 + ... + 397829.

It is an arithmetic number, because the mean of its divisors is an integer number (2554084575).

Almost surely, 2^51865908320 is an apocalyptic number.

It is an amenable number.

51865908320 is an abundant number, since it is smaller than the sum of its proper divisors (70730151280).

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

51865908320 is a wasteful number, since it uses less digits than its factorization.

51865908320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166287 (or 166279 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 51865908320 in words is "fifty-one billion, eight hundred sixty-five million, nine hundred eight thousand, three hundred twenty".