56815549440 has 704 divisors, whose sum is σ = 207988300800. Its totient is φ = 13131841536.

The previous prime is 56815549423. The next prime is 56815549459. The reversal of 56815549440 is 4494551865.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 408744891 + ... + 408745029.

Almost surely, 2^56815549440 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 56815549440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103994150400).

56815549440 is an abundant number, since it is smaller than the sum of its proper divisors (151172751360).

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

56815549440 is a wasteful number, since it uses less digits than its factorization.

56815549440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 56815549440 in words is "fifty-six billion, eight hundred fifteen million, five hundred forty-nine thousand, four hundred forty".