56584978261 has 32 divisors (see below), whose sum is σ = 71774131968. Its totient is φ = 43499151360.

The previous prime is 56584978253. The next prime is 56584978267. The reversal of 56584978261 is 16287948565.

It is not a de Polignac number, because 56584978261 - 2³ = 56584978253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56584978261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56584978267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74941 + ... + 344653.

It is an arithmetic number, because the mean of its divisors is an integer number (2242941624).

Almost surely, 2^56584978261 is an apocalyptic number.

It is an amenable number.

56584978261 is a deficient number, since it is larger than the sum of its proper divisors (15189153707).

56584978261 is a wasteful number, since it uses less digits than its factorization.

56584978261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269821.

The product of its digits is 29030400, while the sum is 61.

The spelling of 56584978261 in words is "fifty-six billion, five hundred eighty-four million, nine hundred seventy-eight thousand, two hundred sixty-one".