51515572704 has 48 divisors (see below), whose sum is σ = 135240094080. Its totient is φ = 17170369920.

The previous prime is 51515572663. The next prime is 51515572729. The reversal of 51515572704 is 40727551515.

51515572704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×51515572704² (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 7 ways as a sum of consecutive naturals, for example, 2034039 + ... + 2059209.

It is an arithmetic number, because the mean of its divisors is an integer number (2817501960).

Almost surely, 2^51515572704 is an apocalyptic number.

It is an amenable number.

51515572704 is an abundant number, since it is smaller than the sum of its proper divisors (83724521376).

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

51515572704 is a wasteful number, since it uses less digits than its factorization.

51515572704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46503 (or 46495 counting only the distinct ones).

The product of its (nonzero) digits is 245000, while the sum is 42.

The spelling of 51515572704 in words is "fifty-one billion, five hundred fifteen million, five hundred seventy-two thousand, seven hundred four".