31131360168 has 64 divisors (see below), whose sum is σ = 78306782400. Its totient is φ = 10313533440.

The previous prime is 31131360157. The next prime is 31131360259. The reversal of 31131360168 is 86106313113.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2659288 + ... + 2670968.

It is an arithmetic number, because the mean of its divisors is an integer number (1223543475).

Almost surely, 2^31131360168 is an apocalyptic number.

It is an amenable number.

31131360168 is an abundant number, since it is smaller than the sum of its proper divisors (47175422232).

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

31131360168 is a wasteful number, since it uses less digits than its factorization.

31131360168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12362 (or 12358 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 31131360168 in words is "thirty-one billion, one hundred thirty-one million, three hundred sixty thousand, one hundred sixty-eight".