31161912468 has 12 divisors (see below), whose sum is σ = 72711129120. Its totient is φ = 10387304152.

The previous prime is 31161912461. The next prime is 31161912491. The reversal of 31161912468 is 86421916113.

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 (31161912461) 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, 1298413008 + ... + 1298413031.

It is an arithmetic number, because the mean of its divisors is an integer number (6059260760).

Almost surely, 2^31161912468 is an apocalyptic number.

It is an amenable number.

31161912468 is an abundant number, since it is smaller than the sum of its proper divisors (41549216652).

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

31161912468 is a wasteful number, since it uses less digits than its factorization.

31161912468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596826046 (or 2596826044 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The spelling of 31161912468 in words is "thirty-one billion, one hundred sixty-one million, nine hundred twelve thousand, four hundred sixty-eight".