56615464620 has 768 divisors, whose sum is σ = 218494402560. Its totient is φ = 11975040000.

The previous prime is 56615464603. The next prime is 56615464621. The reversal of 56615464620 is 2646451665.

56615464620 is a `hidden beast` number, since 5 + 6 + 6 + 15 + 4 + 6 + 4 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (56615464621) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 225559495 + ... + 225559745.

It is an arithmetic number, because the mean of its divisors is an integer number (284497920).

Almost surely, 2^56615464620 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 56615464620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109247201280).

56615464620 is an abundant number, since it is smaller than the sum of its proper divisors (161878937940).

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

56615464620 is a wasteful number, since it uses less digits than its factorization.

56615464620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 56615464620 in words is "fifty-six billion, six hundred fifteen million, four hundred sixty-four thousand, six hundred twenty".