6564652691977 has 2 divisors, whose sum is σ = 6564652691978. Its totient is φ = 6564652691976.

The previous prime is 6564652691963. The next prime is 6564652692029. The reversal of 6564652691977 is 7791962564656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5058446311801 + 1506206380176 = 2249099^2 + 1227276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6564652691977 is a prime.

It is not a weakly prime, because it can be changed into another prime (6564652692977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282326345988 + 3282326345989.

It is an arithmetic number, because the mean of its divisors is an integer number (3282326345989).

Almost surely, 2^{6564652691977} is an apocalyptic number.

It is an amenable number.

6564652691977 is a deficient number, since it is larger than the sum of its proper divisors (1).

6564652691977 is an equidigital number, since it uses as much as digits as its factorization.

6564652691977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1028764800, while the sum is 73.

The spelling of 6564652691977 in words is "six trillion, five hundred sixty-four billion, six hundred fifty-two million, six hundred ninety-one thousand, nine hundred seventy-seven".