856710739745 has 16 divisors (see below), whose sum is σ = 1175169237120. Its totient is φ = 587332967424.

The previous prime is 856710739733. The next prime is 856710739837. The reversal of 856710739745 is 547937017658.

It is a happy number.

It is not a de Polignac number, because 856710739745 - 2²⁰ = 856709691169 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2455475 + ... + 2782584.

It is an arithmetic number, because the mean of its divisors is an integer number (73448077320).

Almost surely, 2^856710739745 is an apocalyptic number.

It is an amenable number.

856710739745 is a deficient number, since it is larger than the sum of its proper divisors (318458497375).

856710739745 is a wasteful number, since it uses less digits than its factorization.

856710739745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5242744.

The product of its (nonzero) digits is 44452800, while the sum is 62.

The spelling of 856710739745 in words is "eight hundred fifty-six billion, seven hundred ten million, seven hundred thirty-nine thousand, seven hundred forty-five".