8643200872 has 8 divisors (see below), whose sum is σ = 16206001650. Its totient is φ = 4321600432.

The previous prime is 8643200869. The next prime is 8643200887. The reversal of 8643200872 is 2780023468.

It can be written as a sum of positive squares in only one way, i.e., 5723527716 + 2919673156 = 75654^2 + 54034^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540200047 + ... + 540200062.

Almost surely, 2^8643200872 is an apocalyptic number.

It is an amenable number.

8643200872 is a deficient number, since it is larger than the sum of its proper divisors (7562800778).

8643200872 is a wasteful number, since it uses less digits than its factorization.

8643200872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080400115 (or 1080400111 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 8643200872 is about 92968.8166645139. The cubic root of 8643200872 is about 2052.2245035284.

The spelling of 8643200872 in words is "eight billion, six hundred forty-three million, two hundred thousand, eight hundred seventy-two".