56815825920 has 352 divisors, whose sum is σ = 212119769088. Its totient is φ = 12709036032.

The previous prime is 56815825901. The next prime is 56815825933. The reversal of 56815825920 is 2952851865.

It is a happy number.

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, 5047819 + ... + 5059061.

Almost surely, 2^56815825920 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 56815825920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106059884544).

56815825920 is an abundant number, since it is smaller than the sum of its proper divisors (155303943168).

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

56815825920 is a wasteful number, since it uses less digits than its factorization.

56815825920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11325 (or 11307 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 51.

The spelling of 56815825920 in words is "fifty-six billion, eight hundred fifteen million, eight hundred twenty-five thousand, nine hundred twenty".