2609321617 has 4 divisors (see below), whose sum is σ = 2982081856. Its totient is φ = 2236561380.

The previous prime is 2609321579. The next prime is 2609321681. The reversal of 2609321617 is 7161239062.

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 2609321617 - 2⁷ = 2609321489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2609321017) 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, 186380109 + ... + 186380122.

It is an arithmetic number, because the mean of its divisors is an integer number (745520464).

Almost surely, 2^2609321617 is an apocalyptic number.

It is an amenable number.

2609321617 is a deficient number, since it is larger than the sum of its proper divisors (372760239).

2609321617 is an equidigital number, since it uses as much as digits as its factorization.

2609321617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372760238.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 2609321617 is about 51081.5193294013. The cubic root of 2609321617 is about 1376.7102231514.

The spelling of 2609321617 in words is "two billion, six hundred nine million, three hundred twenty-one thousand, six hundred seventeen".