56009081820 has 96 divisors (see below), whose sum is σ = 157767559488. Its totient is φ = 14846175232.

The previous prime is 56009081819. The next prime is 56009081831. The reversal of 56009081820 is 2818090065.

56009081820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22610422 + ... + 22612898.

It is an arithmetic number, because the mean of its divisors is an integer number (1643412078).

Almost surely, 2^56009081820 is an apocalyptic number.

It is an amenable number.

56009081820 is an abundant number, since it is smaller than the sum of its proper divisors (101758477668).

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

56009081820 is a wasteful number, since it uses less digits than its factorization.

56009081820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4599 (or 4597 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 56009081820 in words is "fifty-six billion, nine million, eighty-one thousand, eight hundred twenty".