685413608631 has 8 divisors (see below), whose sum is σ = 913888728960. Its totient is φ = 456940447032.

The previous prime is 685413608623. The next prime is 685413608647. The reversal of 685413608631 is 136806314586.

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

It is not a de Polignac number, because 685413608631 - 2³ = 685413608623 is a prime.

It is a super-2 number, since 2×685413608631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685413608681) 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, 851880 + ... + 1447938.

It is an arithmetic number, because the mean of its divisors is an integer number (114236091120).

Almost surely, 2^685413608631 is an apocalyptic number.

685413608631 is a deficient number, since it is larger than the sum of its proper divisors (228475120329).

685413608631 is a wasteful number, since it uses less digits than its factorization.

685413608631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979365.

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 685413608631 in words is "six hundred eighty-five billion, four hundred thirteen million, six hundred eight thousand, six hundred thirty-one".