56421288056 has 32 divisors (see below), whose sum is σ = 120914195040. Its totient is φ = 24178265088.

The previous prime is 56421288043. The next prime is 56421288071. The reversal of 56421288056 is 65088212465.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 56421288056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636740 + ... + 719916.

It is an arithmetic number, because the mean of its divisors is an integer number (3778568595).

Almost surely, 2^56421288056 is an apocalyptic number.

56421288056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

56421288056 is an abundant number, since it is smaller than the sum of its proper divisors (64492906984).

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

56421288056 is a wasteful number, since it uses less digits than its factorization.

56421288056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95303 (or 95299 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 56421288056 in words is "fifty-six billion, four hundred twenty-one million, two hundred eighty-eight thousand, fifty-six".