31956717012 has 48 divisors (see below), whose sum is σ = 81380376000. Its totient is φ = 9679567360.

The previous prime is 31956716993. The next prime is 31956717019. The reversal of 31956717012 is 21071765913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31956717019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252364 + ... + 357212.

It is an arithmetic number, because the mean of its divisors is an integer number (1695424500).

Almost surely, 2^31956717012 is an apocalyptic number.

It is an amenable number.

31956717012 is an abundant number, since it is smaller than the sum of its proper divisors (49423658988).

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

31956717012 is a wasteful number, since it uses less digits than its factorization.

31956717012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107176 (or 107174 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 42.

The spelling of 31956717012 in words is "thirty-one billion, nine hundred fifty-six million, seven hundred seventeen thousand, twelve".