17215609009 has 2 divisors, whose sum is σ = 17215609010. Its totient is φ = 17215609008.

The previous prime is 17215609007. The next prime is 17215609067. The reversal of 17215609009 is 90090651271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9182430625 + 8033178384 = 95825^2 + 89628^2 .

It is a cyclic number.

It is not a de Polignac number, because 17215609009 - 2¹ = 17215609007 is a prime.

Together with 17215609007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (17215609007) 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, 8607804504 + 8607804505.

It is an arithmetic number, because the mean of its divisors is an integer number (8607804505).

Almost surely, 2^17215609009 is an apocalyptic number.

It is an amenable number.

17215609009 is a deficient number, since it is larger than the sum of its proper divisors (1).

17215609009 is an equidigital number, since it uses as much as digits as its factorization.

17215609009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 40.

The spelling of 17215609009 in words is "seventeen billion, two hundred fifteen million, six hundred nine thousand, nine".