56920778885 has 4 divisors (see below), whose sum is σ = 68304934668. Its totient is φ = 45536623104.

The previous prime is 56920778813. The next prime is 56920778899. The reversal of 56920778885 is 58887702965.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31104965956 + 25815812929 = 176366^2 + 160673^2 .

It is a cyclic number.

It is not a de Polignac number, because 56920778885 - 2³⁴ = 39740909701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5692077884 + ... + 5692077893.

It is an arithmetic number, because the mean of its divisors is an integer number (17076233667).

Almost surely, 2^56920778885 is an apocalyptic number.

It is an amenable number.

56920778885 is a deficient number, since it is larger than the sum of its proper divisors (11384155783).

56920778885 is a wasteful number, since it uses less digits than its factorization.

56920778885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11384155782.

The product of its (nonzero) digits is 67737600, while the sum is 65.

The spelling of 56920778885 in words is "fifty-six billion, nine hundred twenty million, seven hundred seventy-eight thousand, eight hundred eighty-five".