56427879639 has 4 divisors (see below), whose sum is σ = 75237172856. Its totient is φ = 37618586424.

The previous prime is 56427879559. The next prime is 56427879643. The reversal of 56427879639 is 93697872465.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56427879639 - 2⁷ = 56427879511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56427879639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56427879439) 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, 9404646604 + ... + 9404646609.

It is an arithmetic number, because the mean of its divisors is an integer number (18809293214).

Almost surely, 2^56427879639 is an apocalyptic number.

56427879639 is a deficient number, since it is larger than the sum of its proper divisors (18809293217).

56427879639 is a wasteful number, since it uses less digits than its factorization.

56427879639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18809293216.

The product of its digits is 137168640, while the sum is 66.

The spelling of 56427879639 in words is "fifty-six billion, four hundred twenty-seven million, eight hundred seventy-nine thousand, six hundred thirty-nine".