9165218816 has 132 divisors (see below), whose sum is σ = 20012683824. Its totient is φ = 4193280000.

The previous prime is 9165218813. The next prime is 9165218861. The reversal of 9165218816 is 6188125619.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9165218813) 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, 36514691 + ... + 36514941.

Almost surely, 2^9165218816 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 9165218816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10006341912).

9165218816 is an abundant number, since it is smaller than the sum of its proper divisors (10847465008).

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

9165218816 is a wasteful number, since it uses less digits than its factorization.

9165218816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 477 counting only the distinct ones).

The product of its digits is 207360, while the sum is 47.

The square root of 9165218816 is about 95735.1493235374. The cubic root of 9165218816 is about 2092.7352004800.

The spelling of 9165218816 in words is "nine billion, one hundred sixty-five million, two hundred eighteen thousand, eight hundred sixteen".