6564636523 has 2 divisors, whose sum is σ = 6564636524. Its totient is φ = 6564636522.

The previous prime is 6564636511. The next prime is 6564636527. The reversal of 6564636523 is 3256364656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6564636523 is a prime.

It is not a weakly prime, because it can be changed into another prime (6564636527) 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 as a sum of consecutive naturals, namely, 3282318261 + 3282318262.

It is an arithmetic number, because the mean of its divisors is an integer number (3282318262).

Almost surely, 2^6564636523 is an apocalyptic number.

6564636523 is a deficient number, since it is larger than the sum of its proper divisors (1).

6564636523 is an equidigital number, since it uses as much as digits as its factorization.

6564636523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 46.

The square root of 6564636523 is about 81022.4445632196. Note that the first 3 decimals coincide. The cubic root of 6564636523 is about 1872.4212512433.

The spelling of 6564636523 in words is "six billion, five hundred sixty-four million, six hundred thirty-six thousand, five hundred twenty-three".