680685131732 has 6 divisors (see below), whose sum is σ = 1191198980538. Its totient is φ = 340342565864.

The previous prime is 680685131681. The next prime is 680685131747. The reversal of 680685131732 is 237131586086.

It can be written as a sum of positive squares in only one way, i.e., 636653984836 + 44031146896 = 797906^2 + 209836^2 .

It is a super-2 number, since 2×680685131732² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85085641463 + ... + 85085641470.

It is an arithmetic number, because the mean of its divisors is an integer number (198533163423).

Almost surely, 2^680685131732 is an apocalyptic number.

It is an amenable number.

680685131732 is a deficient number, since it is larger than the sum of its proper divisors (510513848806).

680685131732 is a wasteful number, since it uses less digits than its factorization.

680685131732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170171282937 (or 170171282935 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 680685131732 in words is "six hundred eighty billion, six hundred eighty-five million, one hundred thirty-one thousand, seven hundred thirty-two".