9121599216 has 200 divisors, whose sum is σ = 28195516800. Its totient is φ = 2840624640.

The previous prime is 9121599209. The next prime is 9121599239. The reversal of 9121599216 is 6129951219.

9121599216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 39 ways as a sum of consecutive naturals, for example, 1161190 + ... + 1169018.

It is an arithmetic number, because the mean of its divisors is an integer number (140977584).

Almost surely, 2^9121599216 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 9121599216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14097758400).

9121599216 is an abundant number, since it is smaller than the sum of its proper divisors (19073917584).

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

9121599216 is a wasteful number, since it uses less digits than its factorization.

9121599216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7909 (or 7894 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 9121599216 is about 95507.0636968806. The cubic root of 9121599216 is about 2089.4099672150.

The spelling of 9121599216 in words is "nine billion, one hundred twenty-one million, five hundred ninety-nine thousand, two hundred sixteen".