2568155845 has 4 divisors (see below), whose sum is σ = 3081787020. Its totient is φ = 2054524672.

The previous prime is 2568155809. The next prime is 2568155861. The reversal of 2568155845 is 5485518652.

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 2041774596 + 526381249 = 45186^2 + 22943^2 .

It is a cyclic number.

It is not a de Polignac number, because 2568155845 - 2²³ = 2559767237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256815580 + ... + 256815589.

It is an arithmetic number, because the mean of its divisors is an integer number (770446755).

Almost surely, 2^2568155845 is an apocalyptic number.

It is an amenable number.

2568155845 is a deficient number, since it is larger than the sum of its proper divisors (513631175).

2568155845 is an equidigital number, since it uses as much as digits as its factorization.

2568155845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513631174.

The product of its digits is 1920000, while the sum is 49.

The square root of 2568155845 is about 50676.9754918346. The cubic root of 2568155845 is about 1369.4319567721.

The spelling of 2568155845 in words is "two billion, five hundred sixty-eight million, one hundred fifty-five thousand, eight hundred forty-five".