31631447268 has 96 divisors (see below), whose sum is σ = 85879422720. Its totient is φ = 10049276160.

The previous prime is 31631447231. The next prime is 31631447387. The reversal of 31631447268 is 86274413613.

31631447268 is a `hidden beast` number, since 3 + 1 + 631 + 4 + 4 + 7 + 2 + 6 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 675346 + ... + 720662.

It is an arithmetic number, because the mean of its divisors is an integer number (894577320).

Almost surely, 2^31631447268 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 31631447268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42939711360).

31631447268 is an abundant number, since it is smaller than the sum of its proper divisors (54247975452).

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

31631447268 is a wasteful number, since it uses less digits than its factorization.

31631447268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45634 (or 45626 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 31631447268 in words is "thirty-one billion, six hundred thirty-one million, four hundred forty-seven thousand, two hundred sixty-eight".