56166722789 has 4 divisors (see below), whose sum is σ = 56432916000. Its totient is φ = 55900529580.

The previous prime is 56166722783. The next prime is 56166722791. The reversal of 56166722789 is 98722766165.

56166722789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56166722789 - 2³² = 51871755493 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 (56166722783) 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, 133096289 + ... + 133096710.

It is an arithmetic number, because the mean of its divisors is an integer number (14108229000).

Almost surely, 2^56166722789 is an apocalyptic number.

It is an amenable number.

56166722789 is a deficient number, since it is larger than the sum of its proper divisors (266193211).

56166722789 is a wasteful number, since it uses less digits than its factorization.

56166722789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266193210.

The product of its digits is 15240960, while the sum is 59.

The spelling of 56166722789 in words is "fifty-six billion, one hundred sixty-six million, seven hundred twenty-two thousand, seven hundred eighty-nine".