56686515280 has 40 divisors (see below), whose sum is σ = 131810552424. Its totient is φ = 22672128000.

The previous prime is 56686515271. The next prime is 56686515287. The reversal of 56686515280 is 8251568665.

It can be written as a sum of positive squares in 4 ways, for example, as 9807337024 + 46879178256 = 99032^2 + 216516^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×56686515280² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56686515287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814660 + ... + 881500.

Almost surely, 2^56686515280 is an apocalyptic number.

It is an amenable number.

56686515280 is an abundant number, since it is smaller than the sum of its proper divisors (75124037144).

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

56686515280 is a wasteful number, since it uses less digits than its factorization.

56686515280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77455 (or 77449 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 52.

The spelling of 56686515280 in words is "fifty-six billion, six hundred eighty-six million, five hundred fifteen thousand, two hundred eighty".