31712808912 has 40 divisors (see below), whose sum is σ = 83829988704. Its totient is φ = 10325099904.

The previous prime is 31712808889. The next prime is 31712808913. The reversal of 31712808912 is 21980821713.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31712808913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7680303 + ... + 7684430.

Almost surely, 2^31712808912 is an apocalyptic number.

It is an amenable number.

31712808912 is an abundant number, since it is smaller than the sum of its proper divisors (52117179792).

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

31712808912 is a wasteful number, since it uses less digits than its factorization.

31712808912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15364787 (or 15364781 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The spelling of 31712808912 in words is "thirty-one billion, seven hundred twelve million, eight hundred eight thousand, nine hundred twelve".