2609665089 has 4 divisors (see below), whose sum is σ = 3479553456. Its totient is φ = 1739776724.

The previous prime is 2609665063. The next prime is 2609665117. The reversal of 2609665089 is 9805669062.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2609665089 - 2¹¹ = 2609663041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2609665489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434944179 + ... + 434944184.

It is an arithmetic number, because the mean of its divisors is an integer number (869888364).

Almost surely, 2^2609665089 is an apocalyptic number.

It is an amenable number.

2609665089 is a deficient number, since it is larger than the sum of its proper divisors (869888367).

2609665089 is an equidigital number, since it uses as much as digits as its factorization.

2609665089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869888366.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 2609665089 is about 51084.8812174404. The cubic root of 2609665089 is about 1376.7706271870.

The spelling of 2609665089 in words is "two billion, six hundred nine million, six hundred sixty-five thousand, eighty-nine".