31663031168 has 32 divisors (see below), whose sum is σ = 63560245320. Its totient is φ = 15710656000.

The previous prime is 31663031161. The next prime is 31663031203. The reversal of 31663031168 is 86113036613.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31663031161) 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, 927383 + ... + 960918.

Almost surely, 2^31663031168 is an apocalyptic number.

It is an amenable number.

31663031168 is an abundant number, since it is smaller than the sum of its proper divisors (31897214152).

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

31663031168 is a wasteful number, since it uses less digits than its factorization.

31663031168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888446 (or 1888434 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

Subtracting 31663031168 from its reverse (86113036613), we obtain a palindrome (54450005445).

The spelling of 31663031168 in words is "thirty-one billion, six hundred sixty-three million, thirty-one thousand, one hundred sixty-eight".