3085218865 has 4 divisors (see below), whose sum is σ = 3702262644. Its totient is φ = 2468175088.

The previous prime is 3085218833. The next prime is 3085218869. The reversal of 3085218865 is 5688125803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5688125803 = 3769 ⋅1509187.

It can be written as a sum of positive squares in 2 ways, for example, as 1684363681 + 1400855184 = 41041^2 + 37428^2 .

It is a cyclic number.

It is not a de Polignac number, because 3085218865 - 2⁵ = 3085218833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3085218869) by changing a digit.

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, 308521882 + ... + 308521891.

It is an arithmetic number, because the mean of its divisors is an integer number (925565661).

Almost surely, 2^3085218865 is an apocalyptic number.

It is an amenable number.

3085218865 is a deficient number, since it is larger than the sum of its proper divisors (617043779).

3085218865 is an equidigital number, since it uses as much as digits as its factorization.

3085218865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617043778.

The product of its (nonzero) digits is 460800, while the sum is 46.

The square root of 3085218865 is about 55544.7465112588. The cubic root of 3085218865 is about 1455.7785837039.

The spelling of 3085218865 in words is "three billion, eighty-five million, two hundred eighteen thousand, eight hundred sixty-five".