56291517689 has 4 divisors (see below), whose sum is σ = 61408928400. Its totient is φ = 51174106980.

The previous prime is 56291517677. The next prime is 56291517697. The reversal of 56291517689 is 98671519265.

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 56291517689 - 2²⁰ = 56290469113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56291517619) 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, 2558705339 + ... + 2558705360.

It is an arithmetic number, because the mean of its divisors is an integer number (15352232100).

Almost surely, 2^56291517689 is an apocalyptic number.

It is an amenable number.

56291517689 is a deficient number, since it is larger than the sum of its proper divisors (5117410711).

56291517689 is a wasteful number, since it uses less digits than its factorization.

56291517689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5117410710.

The product of its digits is 8164800, while the sum is 59.

The spelling of 56291517689 in words is "fifty-six billion, two hundred ninety-one million, five hundred seventeen thousand, six hundred eighty-nine".