8641818920 has 64 divisors (see below), whose sum is σ = 22234504320. Its totient is φ = 2961218304.

The previous prime is 8641818859. The next prime is 8641818959. The reversal of 8641818920 is 298181468.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544619 + ... + 560261.

It is an arithmetic number, because the mean of its divisors is an integer number (347414130).

Almost surely, 2^8641818920 is an apocalyptic number.

It is an amenable number.

8641818920 is an abundant number, since it is smaller than the sum of its proper divisors (13592685400).

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

8641818920 is a wasteful number, since it uses less digits than its factorization.

8641818920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17634 (or 17630 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 8641818920 is about 92961.3840258416. The cubic root of 8641818920 is about 2052.1151217162.

The spelling of 8641818920 in words is "eight billion, six hundred forty-one million, eight hundred eighteen thousand, nine hundred twenty".