51656671704 has 64 divisors (see below), whose sum is σ = 147007146240. Its totient is φ = 14972946560.

The previous prime is 51656671621. The next prime is 51656671711. The reversal of 51656671704 is 40717665615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4247607 + ... + 4259750.

It is an arithmetic number, because the mean of its divisors is an integer number (2296986660).

Almost surely, 2^51656671704 is an apocalyptic number.

It is an amenable number.

51656671704 is an abundant number, since it is smaller than the sum of its proper divisors (95350474536).

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

51656671704 is a wasteful number, since it uses less digits than its factorization.

51656671704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8507400 (or 8507396 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 48.

The spelling of 51656671704 in words is "fifty-one billion, six hundred fifty-six million, six hundred seventy-one thousand, seven hundred four".