31368638412 has 72 divisors (see below), whose sum is σ = 82857116160. Its totient is φ = 9987494880.

The previous prime is 31368638363. The next prime is 31368638447. The reversal of 31368638412 is 21483686313.

31368638412 is a `hidden beast` number, since 3 + 1 + 3 + 6 + 8 + 638 + 4 + 1 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 568987 + ... + 621677.

It is an arithmetic number, because the mean of its divisors is an integer number (1150793280).

Almost surely, 2^31368638412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31368638412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41428558080).

31368638412 is an abundant number, since it is smaller than the sum of its proper divisors (51488477748).

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

31368638412 is a wasteful number, since it uses less digits than its factorization.

31368638412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53443 (or 53438 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The spelling of 31368638412 in words is "thirty-one billion, three hundred sixty-eight million, six hundred thirty-eight thousand, four hundred twelve".