31309295680 has 224 divisors, whose sum is σ = 83691740160. Its totient is φ = 11078000640.

The previous prime is 31309295657. The next prime is 31309295729. The reversal of 31309295680 is 8659290313.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31309295680.

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, 13797586 + ... + 13799854.

It is an arithmetic number, because the mean of its divisors is an integer number (373623840).

Almost surely, 2^31309295680 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 31309295680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41845870080).

31309295680 is an abundant number, since it is smaller than the sum of its proper divisors (52382444480).

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

31309295680 is a wasteful number, since it uses less digits than its factorization.

31309295680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437 (or 2427 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 31309295680 in words is "thirty-one billion, three hundred nine million, two hundred ninety-five thousand, six hundred eighty".