56416255566 has 24 divisors (see below), whose sum is σ = 124022513832. Its totient is φ = 17095834800.

The previous prime is 56416255547. The next prime is 56416255667. The reversal of 56416255566 is 66555261465.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38853445 + ... + 38854896.

It is an arithmetic number, because the mean of its divisors is an integer number (5167604743).

Almost surely, 2^56416255566 is an apocalyptic number.

56416255566 is an abundant number, since it is smaller than the sum of its proper divisors (67606258266).

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

56416255566 is a wasteful number, since it uses less digits than its factorization.

56416255566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77708368 (or 77708357 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 51.

The spelling of 56416255566 in words is "fifty-six billion, four hundred sixteen million, two hundred fifty-five thousand, five hundred sixty-six".