56687814520 has 32 divisors (see below), whose sum is σ = 127554580800. Its totient is φ = 22673881728.

The previous prime is 56687814517. The next prime is 56687814529. The reversal of 56687814520 is 2541878665.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56687814529) 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, 1142386 + ... + 1190974.

It is an arithmetic number, because the mean of its divisors is an integer number (3986080650).

Almost surely, 2^56687814520 is an apocalyptic number.

It is an amenable number.

56687814520 is an abundant number, since it is smaller than the sum of its proper divisors (70866766280).

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

56687814520 is a wasteful number, since it uses less digits than its factorization.

56687814520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77767 (or 77763 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 56687814520 in words is "fifty-six billion, six hundred eighty-seven million, eight hundred fourteen thousand, five hundred twenty".