31946157168 has 20 divisors (see below), whose sum is σ = 82527572808. Its totient is φ = 10648719040.

The previous prime is 31946157163. The next prime is 31946157179. The reversal of 31946157168 is 86175164913.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31946157168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31946157163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332772423 + ... + 332772518.

Almost surely, 2^31946157168 is an apocalyptic number.

It is an amenable number.

31946157168 is an abundant number, since it is smaller than the sum of its proper divisors (50581415640).

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

31946157168 is a wasteful number, since it uses less digits than its factorization.

31946157168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665544952 (or 665544946 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The spelling of 31946157168 in words is "thirty-one billion, nine hundred forty-six million, one hundred fifty-seven thousand, one hundred sixty-eight".