9121797216 has 72 divisors (see below), whose sum is σ = 29645847504. Its totient is φ = 2606227200.

The previous prime is 9121797211. The next prime is 9121797227. The reversal of 9121797216 is 6127971219.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9121797211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2260335 + ... + 2264366.

It is an arithmetic number, because the mean of its divisors is an integer number (411747882).

Almost surely, 2^9121797216 is an apocalyptic number.

9121797216 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

9121797216 is an abundant number, since it is smaller than the sum of its proper divisors (20524050288).

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

9121797216 is a wasteful number, since it uses less digits than its factorization.

9121797216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4524724 (or 4524713 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 9121797216 is about 95508.1002637996. The cubic root of 9121797216 is about 2089.4250851847.

The spelling of 9121797216 in words is "nine billion, one hundred twenty-one million, seven hundred ninety-seven thousand, two hundred sixteen".