16208981617 has 2 divisors, whose sum is σ = 16208981618. Its totient is φ = 16208981616.

The previous prime is 16208981611. The next prime is 16208981627. The reversal of 16208981617 is 71618980261.

16208981617 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., 12804959281 + 3404022336 = 113159^2 + 58344^2 .

It is a cyclic number.

It is not a de Polignac number, because 16208981617 - 2¹¹ = 16208979569 is a prime.

It is not a weakly prime, because it can be changed into another prime (16208981611) 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, 8104490808 + 8104490809.

It is an arithmetic number, because the mean of its divisors is an integer number (8104490809).

Almost surely, 2^16208981617 is an apocalyptic number.

It is an amenable number.

16208981617 is a deficient number, since it is larger than the sum of its proper divisors (1).

16208981617 is an equidigital number, since it uses as much as digits as its factorization.

16208981617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 16208981617 in words is "sixteen billion, two hundred eight million, nine hundred eighty-one thousand, six hundred seventeen".