8608518409 has 2 divisors, whose sum is σ = 8608518410. Its totient is φ = 8608518408.

The previous prime is 8608518379. The next prime is 8608518421. The reversal of 8608518409 is 9048158068.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7930436809 + 678081600 = 89053^2 + 26040^2 .

It is a cyclic number.

It is not a de Polignac number, because 8608518409 - 2⁵ = 8608518377 is a prime.

It is not a weakly prime, because it can be changed into another prime (8608518209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4304259204 + 4304259205.

It is an arithmetic number, because the mean of its divisors is an integer number (4304259205).

Almost surely, 2^8608518409 is an apocalyptic number.

It is an amenable number.

8608518409 is a deficient number, since it is larger than the sum of its proper divisors (1).

8608518409 is an equidigital number, since it uses as much as digits as its factorization.

8608518409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 49.

The square root of 8608518409 is about 92782.1017707618. The cubic root of 8608518409 is about 2049.4758452908.

The spelling of 8608518409 in words is "eight billion, six hundred eight million, five hundred eighteen thousand, four hundred nine".