16505194633 has 2 divisors, whose sum is σ = 16505194634. Its totient is φ = 16505194632.

The previous prime is 16505194631. The next prime is 16505194679. The reversal of 16505194633 is 33649150561.

It is a happy number.

16505194633 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., 16132048144 + 373146489 = 127012^2 + 19317^2 .

It is a cyclic number.

It is not a de Polignac number, because 16505194633 - 2¹ = 16505194631 is a prime.

Together with 16505194631, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16505194633.

It is not a weakly prime, because it can be changed into another prime (16505194631) 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, 8252597316 + 8252597317.

It is an arithmetic number, because the mean of its divisors is an integer number (8252597317).

Almost surely, 2^16505194633 is an apocalyptic number.

It is an amenable number.

16505194633 is a deficient number, since it is larger than the sum of its proper divisors (1).

16505194633 is an equidigital number, since it uses as much as digits as its factorization.

16505194633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 16505194633 in words is "sixteen billion, five hundred five million, one hundred ninety-four thousand, six hundred thirty-three".