56615987379 has 32 divisors (see below), whose sum is σ = 87845502976. Its totient is φ = 31765076640.

The previous prime is 56615987369. The next prime is 56615987423. The reversal of 56615987379 is 97378951665.

It is not a de Polignac number, because 56615987379 - 2⁵ = 56615987347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56615987369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366414 + ... + 497484.

It is an arithmetic number, because the mean of its divisors is an integer number (2745171968).

Almost surely, 2^56615987379 is an apocalyptic number.

56615987379 is a deficient number, since it is larger than the sum of its proper divisors (31229515597).

56615987379 is a wasteful number, since it uses less digits than its factorization.

56615987379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131455.

The product of its digits is 85730400, while the sum is 66.

The spelling of 56615987379 in words is "fifty-six billion, six hundred fifteen million, nine hundred eighty-seven thousand, three hundred seventy-nine".