31247688387864 has 64 divisors (see below), whose sum is σ = 84211441423200. Its totient is φ = 9605181966336.

The previous prime is 31247688387743. The next prime is 31247688387869. The reversal of 31247688387864 is 46878388674213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31247688387869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49117729 + ... + 49749840.

Almost surely, 2^{31247688387864} is an apocalyptic number.

It is an amenable number.

31247688387864 is an abundant number, since it is smaller than the sum of its proper divisors (52963753035336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31247688387864 is a wasteful number, since it uses less digits than its factorization.

31247688387864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98868604 (or 98868600 counting only the distinct ones).

The product of its digits is 2080899072, while the sum is 75.

The spelling of 31247688387864 in words is "thirty-one trillion, two hundred forty-seven billion, six hundred eighty-eight million, three hundred eighty-seven thousand, eight hundred sixty-four".