31996091016 has 192 divisors, whose sum is σ = 93814459200. Its totient is φ = 10102447872.

The previous prime is 31996091003. The next prime is 31996091027. The reversal of 31996091016 is 61019069913.

31996091016 is a `hidden beast` number, since 3 + 19 + 9 + 609 + 10 + 16 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12224940 + ... + 12227556.

It is an arithmetic number, because the mean of its divisors is an integer number (488616975).

Almost surely, 2^31996091016 is an apocalyptic number.

31996091016 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31996091016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46907229600).

31996091016 is an abundant number, since it is smaller than the sum of its proper divisors (61818368184).

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

31996091016 is a wasteful number, since it uses less digits than its factorization.

31996091016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785 (or 2752 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The spelling of 31996091016 in words is "thirty-one billion, nine hundred ninety-six million, ninety-one thousand, sixteen".