9321840640 has 176 divisors, whose sum is σ = 25769797632. Its totient is φ = 3170893824.

The previous prime is 9321840623. The next prime is 9321840691. The reversal of 9321840640 is 460481239.

It is a self number, because there is not a number n which added to its sum of digits gives 9321840640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73400257 + ... + 73400383.

Almost surely, 2^9321840640 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 9321840640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12884898816).

9321840640 is an abundant number, since it is smaller than the sum of its proper divisors (16447956992).

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

9321840640 is an frugal number, since it uses more digits than its factorization.

9321840640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 9321840640 is about 96549.6796473194. The cubic root of 9321840640 is about 2104.5886539824.

The spelling of 9321840640 in words is "nine billion, three hundred twenty-one million, eight hundred forty thousand, six hundred forty".