31679297613 has 32 divisors (see below), whose sum is σ = 47922873600. Its totient is φ = 20678001408.

The previous prime is 31679297603. The next prime is 31679297647.

It is a happy number.

31679297613 is a `hidden beast` number, since 3 + 16 + 7 + 9 + 2 + 9 + 7 + 613 = 666.

31679297613 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31679297613 - 2¹² = 31679293517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31679297613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31679297603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211368 + ... + 328686.

It is an arithmetic number, because the mean of its divisors is an integer number (1497589800).

Almost surely, 2^31679297613 is an apocalyptic number.

It is an amenable number.

31679297613 is a deficient number, since it is larger than the sum of its proper divisors (16243575987).

31679297613 is a wasteful number, since it uses less digits than its factorization.

31679297613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117538 (or 117532 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The spelling of 31679297613 in words is "thirty-one billion, six hundred seventy-nine million, two hundred ninety-seven thousand, six hundred thirteen".