8649585805 has 16 divisors (see below), whose sum is σ = 12560071680. Its totient is φ = 5582253312.

The previous prime is 8649585731. The next prime is 8649585811. The reversal of 8649585805 is 5085859468.

It is a cyclic number.

It is not a de Polignac number, because 8649585805 - 2²¹ = 8647488653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8649585805.

It is a congruent number.

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, 7267965 + ... + 7269154.

It is an arithmetic number, because the mean of its divisors is an integer number (785004480).

Almost surely, 2^8649585805 is an apocalyptic number.

8649585805 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8649585805 is a deficient number, since it is larger than the sum of its proper divisors (3910485875).

8649585805 is a wasteful number, since it uses less digits than its factorization.

8649585805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14537148.

The product of its (nonzero) digits is 13824000, while the sum is 58.

The square root of 8649585805 is about 93003.1494359196. The cubic root of 8649585805 is about 2052.7297210938.

The spelling of 8649585805 in words is "eight billion, six hundred forty-nine million, five hundred eighty-five thousand, eight hundred five".