56615060091 has 16 divisors (see below), whose sum is σ = 78399872000. Its totient is φ = 36301750560.

The previous prime is 56615060087. The next prime is 56615060111. The reversal of 56615060091 is 19006051665.

56615060091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56615060091 - 2² = 56615060087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56615060041) 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, 1852216 + ... + 1882533.

It is an arithmetic number, because the mean of its divisors is an integer number (4899992000).

Almost surely, 2^56615060091 is an apocalyptic number.

56615060091 is a deficient number, since it is larger than the sum of its proper divisors (21784811909).

56615060091 is a wasteful number, since it uses less digits than its factorization.

56615060091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734946.

The product of its (nonzero) digits is 48600, while the sum is 39.

The spelling of 56615060091 in words is "fifty-six billion, six hundred fifteen million, sixty thousand, ninety-one".