2609722265 has 4 divisors (see below), whose sum is σ = 3131666724. Its totient is φ = 2087777808.

The previous prime is 2609722249. The next prime is 2609722273. The reversal of 2609722265 is 5622279062.

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 2047653001 + 562069264 = 45251^2 + 23708^2 .

It is a cyclic number.

It is not a de Polignac number, because 2609722265 - 2⁴ = 2609722249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260972222 + ... + 260972231.

It is an arithmetic number, because the mean of its divisors is an integer number (782916681).

Almost surely, 2^2609722265 is an apocalyptic number.

It is an amenable number.

2609722265 is a deficient number, since it is larger than the sum of its proper divisors (521944459).

2609722265 is an equidigital number, since it uses as much as digits as its factorization.

2609722265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521944458.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 2609722265 is about 51085.4408320022. The cubic root of 2609722265 is about 1376.7806818185.

The spelling of 2609722265 in words is "two billion, six hundred nine million, seven hundred twenty-two thousand, two hundred sixty-five".