9891117232 has 40 divisors (see below), whose sum is σ = 19969704000. Its totient is φ = 4740137472.

The previous prime is 9891117217. The next prime is 9891117233. The reversal of 9891117232 is 2327111989.

It is not an unprimeable number, because it can be changed into a prime (9891117233) 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, 14232 + ... + 141367.

It is an arithmetic number, because the mean of its divisors is an integer number (499242600).

Almost surely, 2^9891117232 is an apocalyptic number.

It is an amenable number.

9891117232 is an abundant number, since it is smaller than the sum of its proper divisors (10078586768).

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

9891117232 is a wasteful number, since it uses less digits than its factorization.

9891117232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155773 (or 155767 counting only the distinct ones).

The product of its digits is 54432, while the sum is 43.

The square root of 9891117232 is about 99454.0961046854. The cubic root of 9891117232 is about 2146.5867769008.

The spelling of 9891117232 in words is "nine billion, eight hundred ninety-one million, one hundred seventeen thousand, two hundred thirty-two".