856712838007 has 8 divisors (see below), whose sum is σ = 931571242784. Its totient is φ = 783134064288.

The previous prime is 856712837977. The next prime is 856712838041. The reversal of 856712838007 is 700838217658.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 856712838007 - 2²³ = 856704449399 is a prime.

It is a super-4 number, since 4×856712838007⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856712848007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319906368 + ... + 319909045.

It is an arithmetic number, because the mean of its divisors is an integer number (116446405348).

Almost surely, 2^856712838007 is an apocalyptic number.

856712838007 is a deficient number, since it is larger than the sum of its proper divisors (74858404777).

856712838007 is a wasteful number, since it uses less digits than its factorization.

856712838007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639815529.

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 856712838007 in words is "eight hundred fifty-six billion, seven hundred twelve million, eight hundred thirty-eight thousand, seven".