6564582517 has 4 divisors (see below), whose sum is σ = 6910086880. Its totient is φ = 6219078156.

The previous prime is 6564582511. The next prime is 6564582551. The reversal of 6564582517 is 7152854656.

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 6564582517 - 2¹⁵ = 6564549749 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 (6564582511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172752153 + ... + 172752190.

It is an arithmetic number, because the mean of its divisors is an integer number (1727521720).

Almost surely, 2^6564582517 is an apocalyptic number.

It is an amenable number.

6564582517 is a deficient number, since it is larger than the sum of its proper divisors (345504363).

6564582517 is a wasteful number, since it uses less digits than its factorization.

6564582517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345504362.

The product of its digits is 2016000, while the sum is 49.

The square root of 6564582517 is about 81022.1112845129. Note that the first 3 decimals coincide. The cubic root of 6564582517 is about 1872.4161165463.

The spelling of 6564582517 in words is "six billion, five hundred sixty-four million, five hundred eighty-two thousand, five hundred seventeen".