31553968368 has 120 divisors (see below), whose sum is σ = 88667991552. Its totient is φ = 9664821504.

The previous prime is 31553968349. The next prime is 31553968399. The reversal of 31553968368 is 86386935513.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1800255 + ... + 1817697.

Almost surely, 2^31553968368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31553968368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44333995776).

31553968368 is an abundant number, since it is smaller than the sum of its proper divisors (57114023184).

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

31553968368 is a wasteful number, since it uses less digits than its factorization.

31553968368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17703 (or 17684 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 57.

The spelling of 31553968368 in words is "thirty-one billion, five hundred fifty-three million, nine hundred sixty-eight thousand, three hundred sixty-eight".