685973498931 has 48 divisors (see below), whose sum is σ = 1138013720064. Its totient is φ = 390046586112.

The previous prime is 685973498929. The next prime is 685973498957. The reversal of 685973498931 is 139894379586.

685973498931 is a `hidden beast` number, since 68 + 5 + 9 + 73 + 498 + 9 + 3 + 1 = 666.

It is not a de Polignac number, because 685973498931 - 2¹ = 685973498929 is a prime.

It is a super-2 number, since 2×685973498931² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 685973498931.

It is not an unprimeable number, because it can be changed into a prime (685973498731) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10614091 + ... + 10678523.

It is an arithmetic number, because the mean of its divisors is an integer number (23708619168).

Almost surely, 2^685973498931 is an apocalyptic number.

685973498931 is a deficient number, since it is larger than the sum of its proper divisors (452040221133).

685973498931 is a wasteful number, since it uses less digits than its factorization.

685973498931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65280 (or 65277 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 72.

The spelling of 685973498931 in words is "six hundred eighty-five billion, nine hundred seventy-three million, four hundred ninety-eight thousand, nine hundred thirty-one".