8644164620 has 192 divisors, whose sum is σ = 23181312000. Its totient is φ = 2633886720.

The previous prime is 8644164619. The next prime is 8644164643. The reversal of 8644164620 is 264614468.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19690361 + ... + 19690799.

It is an arithmetic number, because the mean of its divisors is an integer number (120736000).

Almost surely, 2^8644164620 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 8644164620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11590656000).

8644164620 is an abundant number, since it is smaller than the sum of its proper divisors (14537147380).

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

8644164620 is a wasteful number, since it uses less digits than its factorization.

8644164620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848 (or 846 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 8644164620 is about 92973.9996988405. Note that the first 3 decimals coincide. The cubic root of 8644164620 is about 2052.3007774992.

The spelling of 8644164620 in words is "eight billion, six hundred forty-four million, one hundred sixty-four thousand, six hundred twenty".