6564615241 has 2 divisors, whose sum is σ = 6564615242. Its totient is φ = 6564615240.

The previous prime is 6564615217. The next prime is 6564615251. The reversal of 6564615241 is 1425164656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6354481225 + 210134016 = 79715^2 + 14496^2 .

It is a cyclic number.

It is not a de Polignac number, because 6564615241 - 2⁵ = 6564615209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6564615194 and 6564615203.

It is not a weakly prime, because it can be changed into another prime (6564615251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282307620 + 3282307621.

It is an arithmetic number, because the mean of its divisors is an integer number (3282307621).

Almost surely, 2^6564615241 is an apocalyptic number.

It is an amenable number.

6564615241 is a deficient number, since it is larger than the sum of its proper divisors (1).

6564615241 is an equidigital number, since it uses as much as digits as its factorization.

6564615241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 40.

The square root of 6564615241 is about 81022.3132291346. The cubic root of 6564615241 is about 1872.4192278304.

Adding to 6564615241 its reverse (1425164656), we get a palindrome (7989779897).

The spelling of 6564615241 in words is "six billion, five hundred sixty-four million, six hundred fifteen thousand, two hundred forty-one".