2258289665 has 4 divisors (see below), whose sum is σ = 2709947604. Its totient is φ = 1806631728.

The previous prime is 2258289659. The next prime is 2258289749. The reversal of 2258289665 is 5669828522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5669828522 = 2 ⋅2834914261.

It can be written as a sum of positive squares in 2 ways, for example, as 285508609 + 1972781056 = 16897^2 + 44416^2 .

It is a cyclic number.

It is not a de Polignac number, because 2258289665 - 2¹⁸ = 2258027521 is a prime.

It is a super-2 number, since 2×2258289665² = 10199744422091624450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225828962 + ... + 225828971.

It is an arithmetic number, because the mean of its divisors is an integer number (677486901).

Almost surely, 2^2258289665 is an apocalyptic number.

It is an amenable number.

2258289665 is a deficient number, since it is larger than the sum of its proper divisors (451657939).

2258289665 is an equidigital number, since it uses as much as digits as its factorization.

2258289665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451657938.

The product of its digits is 4147200, while the sum is 53.

The square root of 2258289665 is about 47521.4653077954. The cubic root of 2258289665 is about 1311.9779891165.

The spelling of 2258289665 in words is "two billion, two hundred fifty-eight million, two hundred eighty-nine thousand, six hundred sixty-five".