31321774016 has 28 divisors (see below), whose sum is σ = 66935235192. Its totient is φ = 14456203008.

The previous prime is 31321773997. The next prime is 31321774031. The reversal of 31321774016 is 61047712313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18822350 + ... + 18824013.

It is an arithmetic number, because the mean of its divisors is an integer number (2390544114).

Almost surely, 2^31321774016 is an apocalyptic number.

It is an amenable number.

31321774016 is an abundant number, since it is smaller than the sum of its proper divisors (35613461176).

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

31321774016 is a wasteful number, since it uses less digits than its factorization.

31321774016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37646388 (or 37646378 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 31321774016 in words is "thirty-one billion, three hundred twenty-one million, seven hundred seventy-four thousand, sixteen".