31112475168 has 96 divisors (see below), whose sum is σ = 82879917120. Its totient is φ = 10218286080.

The previous prime is 31112475139. The next prime is 31112475187. The reversal of 31112475168 is 86157421113.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×31112475168² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1885771 + ... + 1902197.

It is an arithmetic number, because the mean of its divisors is an integer number (863332470).

Almost surely, 2^31112475168 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 31112475168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41439958560).

31112475168 is an abundant number, since it is smaller than the sum of its proper divisors (51767441952).

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

31112475168 is a wasteful number, since it uses less digits than its factorization.

31112475168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16730 (or 16722 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The spelling of 31112475168 in words is "thirty-one billion, one hundred twelve million, four hundred seventy-five thousand, one hundred sixty-eight".