6563739617 has 2 divisors, whose sum is σ = 6563739618. Its totient is φ = 6563739616.

The previous prime is 6563739527. The next prime is 6563739649. The reversal of 6563739617 is 7169373656.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5939939041 + 623800576 = 77071^2 + 24976^2 .

It is a cyclic number.

It is not a de Polignac number, because 6563739617 - 2²⁸ = 6295304161 is a prime.

It is not a weakly prime, because it can be changed into another prime (6563739317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3281869808 + 3281869809.

It is an arithmetic number, because the mean of its divisors is an integer number (3281869809).

Almost surely, 2^6563739617 is an apocalyptic number.

It is an amenable number.

6563739617 is a deficient number, since it is larger than the sum of its proper divisors (1).

6563739617 is an equidigital number, since it uses as much as digits as its factorization.

6563739617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 53.

The square root of 6563739617 is about 81016.9094510523. The cubic root of 6563739617 is about 1872.3359729832.

The spelling of 6563739617 in words is "six billion, five hundred sixty-three million, seven hundred thirty-nine thousand, six hundred seventeen".