56671782311 has 4 divisors (see below), whose sum is σ = 57308544000. Its totient is φ = 56035020624.

The previous prime is 56671782287. The next prime is 56671782329. The reversal of 56671782311 is 11328717665.

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 56671782311 - 2¹⁸ = 56671520167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56671782371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318380711 + ... + 318380888.

It is an arithmetic number, because the mean of its divisors is an integer number (14327136000).

Almost surely, 2^56671782311 is an apocalyptic number.

56671782311 is a deficient number, since it is larger than the sum of its proper divisors (636761689).

56671782311 is an equidigital number, since it uses as much as digits as its factorization.

56671782311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636761688.

The product of its digits is 423360, while the sum is 47.

The spelling of 56671782311 in words is "fifty-six billion, six hundred seventy-one million, seven hundred eighty-two thousand, three hundred eleven".