2564858263 has 4 divisors (see below), whose sum is σ = 2798027208. Its totient is φ = 2331689320.

The previous prime is 2564858183. The next prime is 2564858267. The reversal of 2564858263 is 3628584652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2564858263 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 (2564858267) 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, 116584456 + ... + 116584477.

It is an arithmetic number, because the mean of its divisors is an integer number (699506802).

Almost surely, 2^2564858263 is an apocalyptic number.

2564858263 is a deficient number, since it is larger than the sum of its proper divisors (233168945).

2564858263 is a wasteful number, since it uses less digits than its factorization.

2564858263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233168944.

The product of its digits is 2764800, while the sum is 49.

The square root of 2564858263 is about 50644.4297331898. The cubic root of 2564858263 is about 1368.8455764234.

The spelling of 2564858263 in words is "two billion, five hundred sixty-four million, eight hundred fifty-eight thousand, two hundred sixty-three".