8641641585 has 32 divisors (see below), whose sum is σ = 13914362880. Its totient is φ = 4579688448.

The previous prime is 8641641557. The next prime is 8641641629. The reversal of 8641641585 is 5851461468.

It is not a de Polignac number, because 8641641585 - 2⁷ = 8641641457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4911936 + ... + 4913694.

It is an arithmetic number, because the mean of its divisors is an integer number (434823840).

Almost surely, 2^8641641585 is an apocalyptic number.

It is an amenable number.

8641641585 is a deficient number, since it is larger than the sum of its proper divisors (5272721295).

8641641585 is a wasteful number, since it uses less digits than its factorization.

8641641585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657.

The product of its digits is 921600, while the sum is 48.

The square root of 8641641585 is about 92960.4302109236. The cubic root of 8641641585 is about 2052.1010847668.

The spelling of 8641641585 in words is "eight billion, six hundred forty-one million, six hundred forty-one thousand, five hundred eighty-five".