31996863456 has 24 divisors (see below), whose sum is σ = 83991766824. Its totient is φ = 10665621120.

The previous prime is 31996863443. The next prime is 31996863461. The reversal of 31996863456 is 65436869913.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 31996863456.

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, 166650235 + ... + 166650426.

It is an arithmetic number, because the mean of its divisors is an integer number (3499656951).

Almost surely, 2^31996863456 is an apocalyptic number.

It is an amenable number.

31996863456 is an abundant number, since it is smaller than the sum of its proper divisors (51994903368).

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

31996863456 is a wasteful number, since it uses less digits than its factorization.

31996863456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333300674 (or 333300666 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 60.

The spelling of 31996863456 in words is "thirty-one billion, nine hundred ninety-six million, eight hundred sixty-three thousand, four hundred fifty-six".