31679860736 has 26 divisors (see below), whose sum is σ = 63351995322. Its totient is φ = 15839928320.

The previous prime is 31679860733. The next prime is 31679860759. The reversal of 31679860736 is 63706897613.

It can be written as a sum of positive squares in only one way, i.e., 29970534400 + 1709326336 = 173120^2 + 41344^2 .

It is a super-2 number, since 2×31679860736² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31679860733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3863075 + ... + 3871266.

Almost surely, 2^31679860736 is an apocalyptic number.

It is an amenable number.

31679860736 is a deficient number, since it is larger than the sum of its proper divisors (31672134586).

31679860736 is an frugal number, since it uses more digits than its factorization.

31679860736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7734365 (or 7734343 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 56.

The spelling of 31679860736 in words is "thirty-one billion, six hundred seventy-nine million, eight hundred sixty thousand, seven hundred thirty-six".