56716721512 has 32 divisors (see below), whose sum is σ = 122835683520. Its totient is φ = 24263837440.

The previous prime is 56716721497. The next prime is 56716721531. The reversal of 56716721512 is 21512761765.

56716721512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×56716721512² (a number of 22 digits) contains 22 as substring.

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, 18954628 + ... + 18957619.

It is an arithmetic number, because the mean of its divisors is an integer number (3838615110).

Almost surely, 2^56716721512 is an apocalyptic number.

It is an amenable number.

56716721512 is an abundant number, since it is smaller than the sum of its proper divisors (66118962008).

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

56716721512 is a wasteful number, since it uses less digits than its factorization.

56716721512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37912281 (or 37912277 counting only the distinct ones).

The product of its digits is 176400, while the sum is 43.

The spelling of 56716721512 in words is "fifty-six billion, seven hundred sixteen million, seven hundred twenty-one thousand, five hundred twelve".