56856793639 has 4 divisors (see below), whose sum is σ = 58817372760. Its totient is φ = 54896214520.

The previous prime is 56856793571. The next prime is 56856793649. The reversal of 56856793639 is 93639765865.

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 56856793639 - 2⁹ = 56856793127 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 (56856793649) 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, 980289517 + ... + 980289574.

It is an arithmetic number, because the mean of its divisors is an integer number (14704343190).

Almost surely, 2^56856793639 is an apocalyptic number.

56856793639 is a deficient number, since it is larger than the sum of its proper divisors (1960579121).

56856793639 is a wasteful number, since it uses less digits than its factorization.

56856793639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960579120.

The product of its digits is 220449600, while the sum is 67.

The spelling of 56856793639 in words is "fifty-six billion, eight hundred fifty-six million, seven hundred ninety-three thousand, six hundred thirty-nine".