16635441217 has 2 divisors, whose sum is σ = 16635441218. Its totient is φ = 16635441216.

The previous prime is 16635441209. The next prime is 16635441233. The reversal of 16635441217 is 71214453661.

16635441217 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., 16082297856 + 553143361 = 126816^2 + 23519^2 .

It is a cyclic number.

It is not a de Polignac number, because 16635441217 - 2³ = 16635441209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16635441217.

It is not a weakly prime, because it can be changed into another prime (16635441617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8317720608 + 8317720609.

It is an arithmetic number, because the mean of its divisors is an integer number (8317720609).

Almost surely, 2^16635441217 is an apocalyptic number.

It is an amenable number.

16635441217 is a deficient number, since it is larger than the sum of its proper divisors (1).

16635441217 is an equidigital number, since it uses as much as digits as its factorization.

16635441217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

Adding to 16635441217 its reverse (71214453661), we get a palindrome (87849894878).

The spelling of 16635441217 in words is "sixteen billion, six hundred thirty-five million, four hundred forty-one thousand, two hundred seventeen".