56655255664 has 160 divisors (see below), whose sum is σ = 131571578880. Its totient is φ = 23128934400.

The previous prime is 56655255619. The next prime is 56655255691. The reversal of 56655255664 is 46655255665.

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, 65954467 + ... + 65955325.

It is an arithmetic number, because the mean of its divisors is an integer number (822322368).

Almost surely, 2^56655255664 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 56655255664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65785789440).

56655255664 is an abundant number, since it is smaller than the sum of its proper divisors (74916323216).

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

56655255664 is a wasteful number, since it uses less digits than its factorization.

56655255664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1233 counting only the distinct ones).

The product of its digits is 32400000, while the sum is 55.

Subtracting from 56655255664 its reverse (46655255665), we obtain a palindrome (9999999999).

The spelling of 56655255664 in words is "fifty-six billion, six hundred fifty-five million, two hundred fifty-five thousand, six hundred sixty-four".