9691198920 has 384 divisors, whose sum is σ = 35571594240. Its totient is φ = 2271836160.

The previous prime is 9691198901. The next prime is 9691198921. The reversal of 9691198920 is 298911969.

It is not an unprimeable number, because it can be changed into a prime (9691198921) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9719862 + ... + 9720858.

It is an arithmetic number, because the mean of its divisors is an integer number (92634360).

Almost surely, 2^9691198920 is an apocalyptic number.

9691198920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9691198920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17785797120).

9691198920 is an abundant number, since it is smaller than the sum of its proper divisors (25880395320).

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

9691198920 is a wasteful number, since it uses less digits than its factorization.

9691198920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 54.

The square root of 9691198920 is about 98443.8871642115. The cubic root of 9691198920 is about 2132.0260296705.

The spelling of 9691198920 in words is "nine billion, six hundred ninety-one million, one hundred ninety-eight thousand, nine hundred twenty".