51396940112640 has 72 divisors (see below), whose sum is σ = 164148977497008. Its totient is φ = 13705850695680.

The previous prime is 51396940112549. The next prime is 51396940112669. The reversal of 51396940112640 is 4621104969315.

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, 6692306071 + ... + 6692313750.

Almost surely, 2^{51396940112640} is an apocalyptic number.

It is an amenable number.

51396940112640 is an abundant number, since it is smaller than the sum of its proper divisors (112752037384368).

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

51396940112640 is a wasteful number, since it uses less digits than its factorization.

51396940112640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13384619845 (or 13384619831 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 51396940112640 in words is "fifty-one trillion, three hundred ninety-six billion, nine hundred forty million, one hundred twelve thousand, six hundred forty".