2564648069 has 4 divisors (see below), whose sum is σ = 2564799744. Its totient is φ = 2564496396.

The previous prime is 2564648057. The next prime is 2564648123. The reversal of 2564648069 is 9608464652.

2564648069 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2564648069 - 2¹⁶ = 2564582533 is a prime.

It is a super-2 number, since 2×2564648069² = 13154839435650857522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564648369) 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, 46757 + ... + 85530.

It is an arithmetic number, because the mean of its divisors is an integer number (641199936).

Almost surely, 2^2564648069 is an apocalyptic number.

It is an amenable number.

2564648069 is a deficient number, since it is larger than the sum of its proper divisors (151675).

2564648069 is a wasteful number, since it uses less digits than its factorization.

2564648069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151674.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The square root of 2564648069 is about 50642.3544970018. The cubic root of 2564648069 is about 1368.8081824159.

The spelling of 2564648069 in words is "two billion, five hundred sixty-four million, six hundred forty-eight thousand, sixty-nine".