2565576440243 has 4 divisors (see below), whose sum is σ = 2596486999848. Its totient is φ = 2534665880640.

The previous prime is 2565576440209. The next prime is 2565576440299. The reversal of 2565576440243 is 3420446755652.

2565576440243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2565576440243 - 2³² = 2561281472947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565576440443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15455279678 + ... + 15455279843.

It is an arithmetic number, because the mean of its divisors is an integer number (649121749962).

Almost surely, 2^{2565576440243} is an apocalyptic number.

2565576440243 is a deficient number, since it is larger than the sum of its proper divisors (30910559605).

2565576440243 is an equidigital number, since it uses as much as digits as its factorization.

2565576440243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30910559604.

The product of its (nonzero) digits is 24192000, while the sum is 53.

The spelling of 2565576440243 in words is "two trillion, five hundred sixty-five billion, five hundred seventy-six million, four hundred forty thousand, two hundred forty-three".