51371927805864 has 32 divisors (see below), whose sum is σ = 129872851200000. Its totient is φ = 16931571710592.

The previous prime is 51371927805839. The next prime is 51371927805899. The reversal of 51371927805864 is 46850872917315.

It is a junction number, because it is equal to n+sod(n) for n = 51371927805795 and 51371927805804.

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, 12025261864 + ... + 12025266135.

It is an arithmetic number, because the mean of its divisors is an integer number (4058526600000).

It is a 1-persistent number, because it is pandigital, but 2⋅51371927805864 = 102743855611728 is not.

Almost surely, 2^{51371927805864} is an apocalyptic number.

It is an amenable number.

51371927805864 is an abundant number, since it is smaller than the sum of its proper divisors (78500923394136).

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

51371927805864 is a wasteful number, since it uses less digits than its factorization.

51371927805864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24050528097 (or 24050528093 counting only the distinct ones).

The product of its (nonzero) digits is 101606400, while the sum is 66.

The spelling of 51371927805864 in words is "fifty-one trillion, three hundred seventy-one billion, nine hundred twenty-seven million, eight hundred five thousand, eight hundred sixty-four".