6564138717 has 4 divisors (see below), whose sum is σ = 8752184960. Its totient is φ = 4376092476.

The previous prime is 6564138703. The next prime is 6564138733. The reversal of 6564138717 is 7178314656.

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 not a de Polignac number, because 6564138717 - 2⁷ = 6564138589 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 (6564138817) 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, 1094023117 + ... + 1094023122.

It is an arithmetic number, because the mean of its divisors is an integer number (2188046240).

Almost surely, 2^6564138717 is an apocalyptic number.

It is an amenable number.

6564138717 is a deficient number, since it is larger than the sum of its proper divisors (2188046243).

6564138717 is a wasteful number, since it uses less digits than its factorization.

6564138717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188046242.

The product of its digits is 846720, while the sum is 48.

The square root of 6564138717 is about 81019.3724796730. The cubic root of 6564138717 is about 1872.3739205652.

The spelling of 6564138717 in words is "six billion, five hundred sixty-four million, one hundred thirty-eight thousand, seven hundred seventeen".