56398134879765 has 36 divisors (see below), whose sum is σ = 113717055639564. Its totient is φ = 25782004515456.

The previous prime is 56398134879761. The next prime is 56398134879839. The reversal of 56398134879765 is 56797843189365.

56398134879765 is a `hidden beast` number, since 5 + 6 + 39 + 8 + 13 + 487 + 97 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31182049959921 + 25216084919844 = 5584089^2 + 5021562^2 .

It is not a de Polignac number, because 56398134879765 - 2² = 56398134879761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56398134879761) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12788690512 + ... + 12788694921.

It is an arithmetic number, because the mean of its divisors is an integer number (3158807101099).

Almost surely, 2^{56398134879765} is an apocalyptic number.

It is an amenable number.

56398134879765 is an abundant number, since it is smaller than the sum of its proper divisors (57318920759799).

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

56398134879765 is a wasteful number, since it uses less digits than its factorization.

56398134879765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25577385458 (or 25577385448 counting only the distinct ones).

The product of its digits is 8230118400, while the sum is 81.

The spelling of 56398134879765 in words is "fifty-six trillion, three hundred ninety-eight billion, one hundred thirty-four million, eight hundred seventy-nine thousand, seven hundred sixty-five".