31841521168 has 20 divisors (see below), whose sum is σ = 61821757440. Its totient is φ = 15887519264.

The previous prime is 31841521121. The next prime is 31841521273. The reversal of 31841521168 is 86112514813.

It is a self number, because there is not a number n which added to its sum of digits gives 31841521168.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2069680 + ... + 2085007.

It is an arithmetic number, because the mean of its divisors is an integer number (3091087872).

Almost surely, 2^31841521168 is an apocalyptic number.

It is an amenable number.

31841521168 is a deficient number, since it is larger than the sum of its proper divisors (29980236272).

31841521168 is a wasteful number, since it uses less digits than its factorization.

31841521168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155174 (or 4155168 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The spelling of 31841521168 in words is "thirty-one billion, eight hundred forty-one million, five hundred twenty-one thousand, one hundred sixty-eight".