2561584243 has 8 divisors (see below), whose sum is σ = 2596651200. Its totient is φ = 2526583488.

The previous prime is 2561584241. The next prime is 2561584247. The reversal of 2561584243 is 3424851652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2561584243 - 2¹ = 2561584241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2561584196 and 2561584205.

It is not an unprimeable number, because it can be changed into a prime (2561584241) 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 7 ways as a sum of consecutive naturals, for example, 64023 + ... + 96031.

It is an arithmetic number, because the mean of its divisors is an integer number (324581400).

Almost surely, 2^2561584243 is an apocalyptic number.

2561584243 is a deficient number, since it is larger than the sum of its proper divisors (35066957).

2561584243 is a wasteful number, since it uses less digits than its factorization.

2561584243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33101.

The product of its digits is 230400, while the sum is 40.

The square root of 2561584243 is about 50612.0958171068. The cubic root of 2561584243 is about 1368.2628884659.

The spelling of 2561584243 in words is "two billion, five hundred sixty-one million, five hundred eighty-four thousand, two hundred forty-three".