51717056700 has 72 divisors (see below), whose sum is σ = 149667639408. Its totient is φ = 13788177920.

The previous prime is 51717056683. The next prime is 51717056711. The reversal of 51717056700 is 765071715.

It is a super-2 number, since 2×51717056700² (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 23 ways as a sum of consecutive naturals, for example, 1565554 + ... + 1598246.

It is an arithmetic number, because the mean of its divisors is an integer number (2078717214).

Almost surely, 2^51717056700 is an apocalyptic number.

51717056700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51717056700 is an abundant number, since it is smaller than the sum of its proper divisors (97950582708).

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

51717056700 is a wasteful number, since it uses less digits than its factorization.

51717056700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37983 (or 37976 counting only the distinct ones).

The product of its (nonzero) digits is 51450, while the sum is 39.

The spelling of 51717056700 in words is "fifty-one billion, seven hundred seventeen million, fifty-six thousand, seven hundred".