56655561620 has 48 divisors (see below), whose sum is σ = 136787616000. Its totient is φ = 19308440064.

The previous prime is 56655561617. The next prime is 56655561629. The reversal of 56655561620 is 2616555665.

56655561620 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 not an unprimeable number, because it can be changed into a prime (56655561629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1188245 + ... + 1235004.

It is an arithmetic number, because the mean of its divisors is an integer number (2849742000).

Almost surely, 2^56655561620 is an apocalyptic number.

It is an amenable number.

56655561620 is an abundant number, since it is smaller than the sum of its proper divisors (80132054380).

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

56655561620 is a wasteful number, since it uses less digits than its factorization.

56655561620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423432 (or 2423430 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 47.

The spelling of 56655561620 in words is "fifty-six billion, six hundred fifty-five million, five hundred sixty-one thousand, six hundred twenty".