30991169328 has 40 divisors (see below), whose sum is σ = 91497739008. Its totient is φ = 8854619712.

The previous prime is 30991169323. The next prime is 30991169347. The reversal of 30991169328 is 82396119903.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30991169323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46117476 + ... + 46118147.

Almost surely, 2^30991169328 is an apocalyptic number.

It is an amenable number.

30991169328 is an abundant number, since it is smaller than the sum of its proper divisors (60506569680).

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

30991169328 is a wasteful number, since it uses less digits than its factorization.

30991169328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92235641 (or 92235635 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 51.

The spelling of 30991169328 in words is "thirty billion, nine hundred ninety-one million, one hundred sixty-nine thousand, three hundred twenty-eight".