31704640713 has 12 divisors (see below), whose sum is σ = 45797461060. Its totient is φ = 21135564576.

The previous prime is 31704640711. The next prime is 31704640729.

31704640713 is a `hidden beast` number, since 3 + 1 + 7 + 0 + 4 + 640 + 7 + 1 + 3 = 666.

31704640713 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 29231766729 + 2472873984 = 170973^2 + 49728^2 .

It is not a de Polignac number, because 31704640713 - 2¹ = 31704640711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31704640711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225783 + ... + 338211.

Almost surely, 2^31704640713 is an apocalyptic number.

It is an amenable number.

31704640713 is a deficient number, since it is larger than the sum of its proper divisors (14092820347).

31704640713 is a wasteful number, since it uses less digits than its factorization.

31704640713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143768 (or 143765 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The spelling of 31704640713 in words is "thirty-one billion, seven hundred four million, six hundred forty thousand, seven hundred thirteen".