856376658679 has 4 divisors (see below), whose sum is σ = 859930089040. Its totient is φ = 852823228320.

The previous prime is 856376658677. The next prime is 856376658691. The reversal of 856376658679 is 976856673658.

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 856376658679 - 2¹ = 856376658677 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 (856376658677) 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, 1776714819 + ... + 1776715300.

It is an arithmetic number, because the mean of its divisors is an integer number (214982522260).

Almost surely, 2^856376658679 is an apocalyptic number.

856376658679 is a deficient number, since it is larger than the sum of its proper divisors (3553430361).

856376658679 is a wasteful number, since it uses less digits than its factorization.

856376658679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553430360.

The product of its digits is 2743372800, while the sum is 76.

The spelling of 856376658679 in words is "eight hundred fifty-six billion, three hundred seventy-six million, six hundred fifty-eight thousand, six hundred seventy-nine".