8943797664 has 144 divisors (see below), whose sum is σ = 27455500800. Its totient is φ = 2753253888.

The previous prime is 8943797663. The next prime is 8943797671. The reversal of 8943797664 is 4667973498.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (8943797663) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 168817 + ... + 215375.

It is an arithmetic number, because the mean of its divisors is an integer number (190663200).

Almost surely, 2^8943797664 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 8943797664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13727750400).

8943797664 is an abundant number, since it is smaller than the sum of its proper divisors (18511703136).

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

8943797664 is a wasteful number, since it uses less digits than its factorization.

8943797664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46627 (or 46616 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 63.

The square root of 8943797664 is about 94571.6535966248. The cubic root of 8943797664 is about 2075.7449428818.

The spelling of 8943797664 in words is "eight billion, nine hundred forty-three million, seven hundred ninety-seven thousand, six hundred sixty-four".