51712313440 has 24 divisors (see below), whose sum is σ = 122170340880. Its totient is φ = 20684925312.

The previous prime is 51712313437. The next prime is 51712313503. The reversal of 51712313440 is 4431321715.

It is a super-2 number, since 2×51712313440² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161600820 + ... + 161601139.

It is an arithmetic number, because the mean of its divisors is an integer number (5090430870).

Almost surely, 2^51712313440 is an apocalyptic number.

It is an amenable number.

51712313440 is an abundant number, since it is smaller than the sum of its proper divisors (70458027440).

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

51712313440 is a wasteful number, since it uses less digits than its factorization.

51712313440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323201974 (or 323201966 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 51712313440 in words is "fifty-one billion, seven hundred twelve million, three hundred thirteen thousand, four hundred forty".