6564224657 has 4 divisors (see below), whose sum is σ = 6565685616. Its totient is φ = 6562763700.

The previous prime is 6564224647. The next prime is 6564224659. The reversal of 6564224657 is 7564224656.

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 a de Polignac number, because none of the positive numbers 2^k-6564224657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6564224659) 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, 723719 + ... + 732732.

It is an arithmetic number, because the mean of its divisors is an integer number (1641421404).

Almost surely, 2^6564224657 is an apocalyptic number.

It is an amenable number.

6564224657 is a deficient number, since it is larger than the sum of its proper divisors (1460959).

6564224657 is a wasteful number, since it uses less digits than its factorization.

6564224657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460958.

The product of its digits is 2419200, while the sum is 47.

The square root of 6564224657 is about 81019.9028449183. The cubic root of 6564224657 is about 1872.3820917876.

Subtracting 6564224657 from its reverse (7564224656), we obtain a palindrome (999999999).

The spelling of 6564224657 in words is "six billion, five hundred sixty-four million, two hundred twenty-four thousand, six hundred fifty-seven".