56289108791 has 4 divisors (see below), whose sum is σ = 56332177512. Its totient is φ = 56246040072.

The previous prime is 56289108781. The next prime is 56289108797. The reversal of 56289108791 is 19780198265.

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 56289108791 - 2²² = 56284914487 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 (56289108797) 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, 21532400 + ... + 21535013.

It is an arithmetic number, because the mean of its divisors is an integer number (14083044378).

Almost surely, 2^56289108791 is an apocalyptic number.

56289108791 is a deficient number, since it is larger than the sum of its proper divisors (43068721).

56289108791 is a wasteful number, since it uses less digits than its factorization.

56289108791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43068720.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 56289108791 in words is "fifty-six billion, two hundred eighty-nine million, one hundred eight thousand, seven hundred ninety-one".