31868539572 has 12 divisors (see below), whose sum is σ = 74359925696. Its totient is φ = 10622846520.

The previous prime is 31868539511. The next prime is 31868539579. The reversal of 31868539572 is 27593586813.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31868539579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1327855804 + ... + 1327855827.

Almost surely, 2^31868539572 is an apocalyptic number.

It is an amenable number.

31868539572 is an abundant number, since it is smaller than the sum of its proper divisors (42491386124).

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

31868539572 is a wasteful number, since it uses less digits than its factorization.

31868539572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655711638 (or 2655711636 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 57.

The spelling of 31868539572 in words is "thirty-one billion, eight hundred sixty-eight million, five hundred thirty-nine thousand, five hundred seventy-two".