8640578593 has 16 divisors (see below), whose sum is σ = 9237545856. Its totient is φ = 8053838080.

The previous prime is 8640578503. The next prime is 8640578603. The reversal of 8640578593 is 3958750468.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8640578593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8640578503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 767898 + ... + 779068.

It is an arithmetic number, because the mean of its divisors is an integer number (577346616).

Almost surely, 2^8640578593 is an apocalyptic number.

It is an amenable number.

8640578593 is a deficient number, since it is larger than the sum of its proper divisors (596967263).

8640578593 is a wasteful number, since it uses less digits than its factorization.

8640578593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11624.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The square root of 8640578593 is about 92954.7125916701. The cubic root of 8640578593 is about 2052.0169396245.

The spelling of 8640578593 in words is "eight billion, six hundred forty million, five hundred seventy-eight thousand, five hundred ninety-three".