856932393879 has 12 divisors (see below), whose sum is σ = 1302938143000. Its totient is φ = 541220459184.

The previous prime is 856932393833. The next prime is 856932393899. The reversal of 856932393879 is 978393239658.

856932393879 is a `hidden beast` number, since 8 + 5 + 6 + 9 + 3 + 239 + 387 + 9 = 666.

856932393879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 856932393879 - 2¹¹ = 856932391831 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 (856932393809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2505650104 + ... + 2505650445.

Almost surely, 2^856932393879 is an apocalyptic number.

856932393879 is a deficient number, since it is larger than the sum of its proper divisors (446005749121).

856932393879 is a wasteful number, since it uses less digits than its factorization.

856932393879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5011300574 (or 5011300571 counting only the distinct ones).

The product of its digits is 529079040, while the sum is 72.

The spelling of 856932393879 in words is "eight hundred fifty-six billion, nine hundred thirty-two million, three hundred ninety-three thousand, eight hundred seventy-nine".