56161583345559 has 16 divisors (see below), whose sum is σ = 81365961159680. Its totient is φ = 34326264862080.

The previous prime is 56161583345507. The next prime is 56161583345579. The reversal of 56161583345559 is 95554338516165.

It is not a de Polignac number, because 56161583345559 - 2²¹ = 56161581248407 is a prime.

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 56161583345559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56161583345579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15891787522 + ... + 15891791055.

It is an arithmetic number, because the mean of its divisors is an integer number (5085372572480).

Almost surely, 2^{56161583345559} is an apocalyptic number.

56161583345559 is a deficient number, since it is larger than the sum of its proper divisors (25204377814121).

56161583345559 is a wasteful number, since it uses less digits than its factorization.

56161583345559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31783578630.

The product of its digits is 291600000, while the sum is 66.

The spelling of 56161583345559 in words is "fifty-six trillion, one hundred sixty-one billion, five hundred eighty-three million, three hundred forty-five thousand, five hundred fifty-nine".