31718331864 has 80 divisors (see below), whose sum is σ = 89756759400. Its totient is φ = 10463758848.

The previous prime is 31718331851. The next prime is 31718331871. The reversal of 31718331864 is 46813381713.

31718331864 is a `hidden beast` number, since 317 + 18 + 3 + 318 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 189454 + ... + 315165.

Almost surely, 2^31718331864 is an apocalyptic number.

It is an amenable number.

31718331864 is an abundant number, since it is smaller than the sum of its proper divisors (58038427536).

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

31718331864 is a wasteful number, since it uses less digits than its factorization.

31718331864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504734 (or 504721 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The spelling of 31718331864 in words is "thirty-one billion, seven hundred eighteen million, three hundred thirty-one thousand, eight hundred sixty-four".