856708007631 has 32 divisors (see below), whose sum is σ = 1311556878336. Its totient is φ = 487264572000.

The previous prime is 856708007621. The next prime is 856708007633. The reversal of 856708007631 is 136700807658.

It is not a de Polignac number, because 856708007631 - 2¹³ = 856707999439 is a prime.

It is a super-2 number, since 2×856708007631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856708007633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5794416 + ... + 5940426.

It is an arithmetic number, because the mean of its divisors is an integer number (40986152448).

Almost surely, 2^856708007631 is an apocalyptic number.

856708007631 is a deficient number, since it is larger than the sum of its proper divisors (454848870705).

856708007631 is a wasteful number, since it uses less digits than its factorization.

856708007631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147323.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 856708007631 in words is "eight hundred fifty-six billion, seven hundred eight million, seven thousand, six hundred thirty-one".