6589991689 has 4 divisors (see below), whose sum is σ = 6592398660. Its totient is φ = 6587584720.

The previous prime is 6589991669. The next prime is 6589991731. The reversal of 6589991689 is 9861999856.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3536324089 + 3053667600 = 59467^2 + 55260^2 .

It is a cyclic number.

It is not a de Polignac number, because 6589991689 - 2²³ = 6581603081 is a prime.

It is a super-2 number, since 2×6589991689² = 86855980922178145442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6589991609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199374 + ... + 1204855.

It is an arithmetic number, because the mean of its divisors is an integer number (1648099665).

Almost surely, 2^6589991689 is an apocalyptic number.

It is an amenable number.

6589991689 is a deficient number, since it is larger than the sum of its proper divisors (2406971).

6589991689 is a wasteful number, since it uses less digits than its factorization.

6589991689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406970.

The product of its digits is 75582720, while the sum is 70.

The square root of 6589991689 is about 81178.7637809298. The cubic root of 6589991689 is about 1874.8288259972.

The spelling of 6589991689 in words is "six billion, five hundred eighty-nine million, nine hundred ninety-one thousand, six hundred eighty-nine".