2564543443 has 16 divisors (see below), whose sum is σ = 3201140736. Its totient is φ = 1995978240.

The previous prime is 2564543431. The next prime is 2564543477. The reversal of 2564543443 is 3443454652.

It is a cyclic number.

It is not a de Polignac number, because 2564543443 - 2²⁵ = 2530989011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2564543396 and 2564543405.

It is not an unprimeable number, because it can be changed into a prime (2564543413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47155 + ... + 85747.

It is an arithmetic number, because the mean of its divisors is an integer number (200071296).

Almost surely, 2^2564543443 is an apocalyptic number.

2564543443 is a deficient number, since it is larger than the sum of its proper divisors (636597293).

2564543443 is a wasteful number, since it uses less digits than its factorization.

2564543443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39474.

The product of its digits is 691200, while the sum is 40.

The square root of 2564543443 is about 50641.3214973701. The cubic root of 2564543443 is about 1368.7895684425.

The spelling of 2564543443 in words is "two billion, five hundred sixty-four million, five hundred forty-three thousand, four hundred forty-three".