31239648713 has 16 divisors (see below), whose sum is σ = 38500909440. Its totient is φ = 24683584896.

The previous prime is 31239648707. The next prime is 31239648751. The reversal of 31239648713 is 31784693213.

It is a cyclic number.

It is not a de Polignac number, because 31239648713 - 2⁴ = 31239648697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31239648413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165020 + ... + 299517.

It is an arithmetic number, because the mean of its divisors is an integer number (2406306840).

Almost surely, 2^31239648713 is an apocalyptic number.

It is an amenable number.

31239648713 is a deficient number, since it is larger than the sum of its proper divisors (7261260727).

31239648713 is a wasteful number, since it uses less digits than its factorization.

31239648713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465296.

The product of its digits is 653184, while the sum is 47.

The spelling of 31239648713 in words is "thirty-one billion, two hundred thirty-nine million, six hundred forty-eight thousand, seven hundred thirteen".