685676128232 has 16 divisors (see below), whose sum is σ = 1361268784260. Its totient is φ = 322671119104.

The previous prime is 685676128097. The next prime is 685676128261. The reversal of 685676128232 is 232821676586.

It can be written as a sum of positive squares in 2 ways, for example, as 572676616516 + 112999511716 = 756754^2 + 336154^2 .

It is a super-2 number, since 2×685676128232² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2520867983 + ... + 2520868254.

Almost surely, 2^685676128232 is an apocalyptic number.

It is an amenable number.

685676128232 is a deficient number, since it is larger than the sum of its proper divisors (675592656028).

685676128232 is a wasteful number, since it uses less digits than its factorization.

685676128232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041736260 (or 5041736256 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 56.

The spelling of 685676128232 in words is "six hundred eighty-five billion, six hundred seventy-six million, one hundred twenty-eight thousand, two hundred thirty-two".