8643768832 has 20 divisors (see below), whose sum is σ = 17270656326. Its totient is φ = 4321884160.

The previous prime is 8643768829. The next prime is 8643768841. The reversal of 8643768832 is 2388673468.

It can be written as a sum of positive squares in only one way, i.e., 4886569216 + 3757199616 = 69904^2 + 61296^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8440669 + ... + 8441692.

Almost surely, 2^8643768832 is an apocalyptic number.

It is an amenable number.

8643768832 is a deficient number, since it is larger than the sum of its proper divisors (8626887494).

8643768832 is an equidigital number, since it uses as much as digits as its factorization.

8643768832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16882379 (or 16882363 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 55.

The square root of 8643768832 is about 92971.8711869348. The cubic root of 8643768832 is about 2052.2694543098.

The spelling of 8643768832 in words is "eight billion, six hundred forty-three million, seven hundred sixty-eight thousand, eight hundred thirty-two".