56691819607 has 4 divisors (see below), whose sum is σ = 56697527800. Its totient is φ = 56686111416.

The previous prime is 56691819581. The next prime is 56691819631. The reversal of 56691819607 is 70691819665.

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 56691819607 - 2⁷ = 56691819479 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 (56691819707) 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, 2839173 + ... + 2859070.

It is an arithmetic number, because the mean of its divisors is an integer number (14174381950).

Almost surely, 2^56691819607 is an apocalyptic number.

56691819607 is a deficient number, since it is larger than the sum of its proper divisors (5708193).

56691819607 is an equidigital number, since it uses as much as digits as its factorization.

56691819607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5708192.

The product of its (nonzero) digits is 4898880, while the sum is 58.

Adding to 56691819607 its sum of digits (58), we get a palindrome (56691819665).

The spelling of 56691819607 in words is "fifty-six billion, six hundred ninety-one million, eight hundred nineteen thousand, six hundred seven".