864791585 has 16 divisors (see below), whose sum is σ = 1192029696. Its totient is φ = 589985088.

The previous prime is 864791567. The next prime is 864791621. The reversal of 864791585 is 585197468.

It is a de Polignac number, because none of the positive numbers 2^k-864791585 is a prime.

It is a Duffinian 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, 55817 + ... + 69606.

It is an arithmetic number, because the mean of its divisors is an integer number (74501856).

Almost surely, 2^864791585 is an apocalyptic number.

It is an amenable number.

864791585 is a deficient number, since it is larger than the sum of its proper divisors (327238111).

864791585 is a wasteful number, since it uses less digits than its factorization.

864791585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125632.

The product of its digits is 2419200, while the sum is 53.

The square root of 864791585 is about 29407.3389649591. The cubic root of 864791585 is about 952.7314134282.

The spelling of 864791585 in words is "eight hundred sixty-four million, seven hundred ninety-one thousand, five hundred eighty-five".