56412389618 has 18 divisors (see below), whose sum is σ = 91635501069. Its totient is φ = 26034472152.

The previous prime is 56412389597. The next prime is 56412389633. The reversal of 56412389618 is 81698321465.

It can be written as a sum of positive squares in 2 ways, for example, as 48234262129 + 8178127489 = 219623^2 + 90433^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=167947.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56412389618.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4360163 + ... + 4373081.

Almost surely, 2^56412389618 is an apocalyptic number.

56412389618 is a deficient number, since it is larger than the sum of its proper divisors (35223111451).

56412389618 is an frugal number, since it uses more digits than its factorization.

56412389618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25866 (or 12934 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 53.

The spelling of 56412389618 in words is "fifty-six billion, four hundred twelve million, three hundred eighty-nine thousand, six hundred eighteen".