8644285865 has 16 divisors (see below), whose sum is σ = 10544916096. Its totient is φ = 6801849600.

The previous prime is 8644285813. The next prime is 8644285879. The reversal of 8644285865 is 5685824468.

It is not a de Polignac number, because 8644285865 - 2⁶ = 8644285801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8644285865.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15620 + ... + 132410.

It is an arithmetic number, because the mean of its divisors is an integer number (659057256).

Almost surely, 2^8644285865 is an apocalyptic number.

It is an amenable number.

8644285865 is a deficient number, since it is larger than the sum of its proper divisors (1900630231).

8644285865 is a wasteful number, since it uses less digits than its factorization.

8644285865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117040.

The product of its digits is 14745600, while the sum is 56.

The square root of 8644285865 is about 92974.6517336849. The cubic root of 8644285865 is about 2052.3103727987.

The spelling of 8644285865 in words is "eight billion, six hundred forty-four million, two hundred eighty-five thousand, eight hundred sixty-five".