9814659664609 has 2 divisors, whose sum is σ = 9814659664610. Its totient is φ = 9814659664608.

The previous prime is 9814659664603. The next prime is 9814659664643. The reversal of 9814659664609 is 9064669564189.

9814659664609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9486276800400 + 328382864209 = 3079980^2 + 573047^2 .

It is a cyclic number.

It is not a de Polignac number, because 9814659664609 - 2²⁷ = 9814525446881 is a prime.

It is not a weakly prime, because it can be changed into another prime (9814659664603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4907329832304 + 4907329832305.

It is an arithmetic number, because the mean of its divisors is an integer number (4907329832305).

Almost surely, 2^{9814659664609} is an apocalyptic number.

It is an amenable number.

9814659664609 is a deficient number, since it is larger than the sum of its proper divisors (1).

9814659664609 is an equidigital number, since it uses as much as digits as its factorization.

9814659664609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604661760, while the sum is 73.

The spelling of 9814659664609 in words is "nine trillion, eight hundred fourteen billion, six hundred fifty-nine million, six hundred sixty-four thousand, six hundred nine".