56785521211 has 4 divisors (see below), whose sum is σ = 57113761392. Its totient is φ = 56457281032.

The previous prime is 56785521193. The next prime is 56785521241. The reversal of 56785521211 is 11212558765.

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 56785521211 - 2⁷ = 56785521083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56785521241) 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 3 ways as a sum of consecutive naturals, for example, 164119831 + ... + 164120176.

It is an arithmetic number, because the mean of its divisors is an integer number (14278440348).

Almost surely, 2^56785521211 is an apocalyptic number.

56785521211 is a deficient number, since it is larger than the sum of its proper divisors (328240181).

56785521211 is a wasteful number, since it uses less digits than its factorization.

56785521211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328240180.

The product of its digits is 168000, while the sum is 43.

The spelling of 56785521211 in words is "fifty-six billion, seven hundred eighty-five million, five hundred twenty-one thousand, two hundred eleven".