31996990608 has 80 divisors (see below), whose sum is σ = 91519309056. Its totient is φ = 9551329920.

The previous prime is 31996990607. The next prime is 31996990609. The reversal of 31996990608 is 80609969913.

It is an interprime number because it is at equal distance from previous prime (31996990607) and next prime (31996990609).

It is a super-4 number, since 4×31996990608⁴ (a number of 43 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (31996990607) by changing a digit.

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, 416866 + ... + 487617.

Almost surely, 2^31996990608 is an apocalyptic number.

It is an amenable number.

31996990608 is an abundant number, since it is smaller than the sum of its proper divisors (59522318448).

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

31996990608 is a wasteful number, since it uses less digits than its factorization.

31996990608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904572 (or 904566 counting only the distinct ones).

The product of its (nonzero) digits is 5668704, while the sum is 60.

The spelling of 31996990608 in words is "thirty-one billion, nine hundred ninety-six million, nine hundred ninety thousand, six hundred eight".