56209665920 has 256 divisors, whose sum is σ = 141280200000. Its totient is φ = 21365194752.

The previous prime is 56209665907. The next prime is 56209665971. The reversal of 56209665920 is 2956690265.

56209665920 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, 314020391 + ... + 314020569.

Almost surely, 2^56209665920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56209665920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70640100000).

56209665920 is an abundant number, since it is smaller than the sum of its proper divisors (85070534080).

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

56209665920 is a wasteful number, since it uses less digits than its factorization.

56209665920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 56209665920 in words is "fifty-six billion, two hundred nine million, six hundred sixty-five thousand, nine hundred twenty".