56842981641 has 6 divisors (see below), whose sum is σ = 82106529050. Its totient is φ = 37895321088.

The previous prime is 56842981607. The next prime is 56842981729. The reversal of 56842981641 is 14618924865.

56842981641 is a `hidden beast` number, since 56 + 8 + 429 + 8 + 164 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 56443781241 + 399200400 = 237579^2 + 19980^2 .

It is not a de Polignac number, because 56842981641 - 2⁷ = 56842981513 is a prime.

It is a super-2 number, since 2×56842981641² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56842981541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3157943416 + ... + 3157943433.

Almost surely, 2^56842981641 is an apocalyptic number.

It is an amenable number.

56842981641 is a deficient number, since it is larger than the sum of its proper divisors (25263547409).

56842981641 is a wasteful number, since it uses less digits than its factorization.

56842981641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6315886855 (or 6315886852 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The spelling of 56842981641 in words is "fifty-six billion, eight hundred forty-two million, nine hundred eighty-one thousand, six hundred forty-one".