16683349649 has 2 divisors, whose sum is σ = 16683349650. Its totient is φ = 16683349648.

The previous prime is 16683349643. The next prime is 16683349681. The reversal of 16683349649 is 94694338661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9277542400 + 7405807249 = 96320^2 + 86057^2 .

It is a cyclic number.

It is not a de Polignac number, because 16683349649 - 2³² = 12388382353 is a prime.

It is not a weakly prime, because it can be changed into another prime (16683349643) 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, 8341674824 + 8341674825.

It is an arithmetic number, because the mean of its divisors is an integer number (8341674825).

Almost surely, 2^16683349649 is an apocalyptic number.

It is an amenable number.

16683349649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16683349649 is an equidigital number, since it uses as much as digits as its factorization.

16683349649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20155392, while the sum is 59.

The spelling of 16683349649 in words is "sixteen billion, six hundred eighty-three million, three hundred forty-nine thousand, six hundred forty-nine".