56612661899 has 4 divisors (see below), whose sum is σ = 56992612800. Its totient is φ = 56232711000.

The previous prime is 56612661841. The next prime is 56612661913. The reversal of 56612661899 is 99816621665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56612661899 - 2⁸ = 56612661643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56612661799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189975227 + ... + 189975524.

It is an arithmetic number, because the mean of its divisors is an integer number (14248153200).

Almost surely, 2^56612661899 is an apocalyptic number.

56612661899 is a deficient number, since it is larger than the sum of its proper divisors (379950901).

56612661899 is a wasteful number, since it uses less digits than its factorization.

56612661899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379950900.

The product of its digits is 8398080, while the sum is 59.

The spelling of 56612661899 in words is "fifty-six billion, six hundred twelve million, six hundred sixty-one thousand, eight hundred ninety-nine".