2564556263 has 8 divisors (see below), whose sum is σ = 2585954400. Its totient is φ = 2543214240.

The previous prime is 2564556257. The next prime is 2564556277. The reversal of 2564556263 is 3626554652.

2564556263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2564556263 - 2¹⁰ = 2564555239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564553263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80381 + ... + 107657.

It is an arithmetic number, because the mean of its divisors is an integer number (323244300).

Almost surely, 2^2564556263 is an apocalyptic number.

2564556263 is a deficient number, since it is larger than the sum of its proper divisors (21398137).

2564556263 is a wasteful number, since it uses less digits than its factorization.

2564556263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28057.

The product of its digits is 1296000, while the sum is 44.

The square root of 2564556263 is about 50641.4480736876. The cubic root of 2564556263 is about 1368.7918492712.

The spelling of 2564556263 in words is "two billion, five hundred sixty-four million, five hundred fifty-six thousand, two hundred sixty-three".