31956660612 has 36 divisors (see below), whose sum is σ = 80793812736. Its totient is φ = 10650311280.

The previous prime is 31956660611. The next prime is 31956660629. The reversal of 31956660612 is 21606665913.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (31956660611) 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 11 ways as a sum of consecutive naturals, for example, 131833 + ... + 285119.

It is an arithmetic number, because the mean of its divisors is an integer number (2244272576).

Almost surely, 2^31956660612 is an apocalyptic number.

It is an amenable number.

31956660612 is an abundant number, since it is smaller than the sum of its proper divisors (48837152124).

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

31956660612 is a wasteful number, since it uses less digits than its factorization.

31956660612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159088 (or 159083 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 31956660612 in words is "thirty-one billion, nine hundred fifty-six million, six hundred sixty thousand, six hundred twelve".