17008645649 has 2 divisors, whose sum is σ = 17008645650. Its totient is φ = 17008645648.

The previous prime is 17008645583. The next prime is 17008645789. The reversal of 17008645649 is 94654680071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14248719424 + 2759926225 = 119368^2 + 52535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17008645649 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 17008645597 and 17008645606.

It is not a weakly prime, because it can be changed into another prime (17008641649) 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, 8504322824 + 8504322825.

It is an arithmetic number, because the mean of its divisors is an integer number (8504322825).

Almost surely, 2^17008645649 is an apocalyptic number.

It is an amenable number.

17008645649 is a deficient number, since it is larger than the sum of its proper divisors (1).

17008645649 is an equidigital number, since it uses as much as digits as its factorization.

17008645649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 17008645649 in words is "seventeen billion, eight million, six hundred forty-five thousand, six hundred forty-nine".