16643336263 has 16 divisors (see below), whose sum is σ = 17691605280. Its totient is φ = 15627136896.

The previous prime is 16643336261. The next prime is 16643336287. The reversal of 16643336263 is 36263334661.

It is a cyclic number.

It is not a de Polignac number, because 16643336263 - 2¹ = 16643336261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16643336261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3803745 + ... + 3808117.

It is an arithmetic number, because the mean of its divisors is an integer number (1105725330).

Almost surely, 2^16643336263 is an apocalyptic number.

16643336263 is a deficient number, since it is larger than the sum of its proper divisors (1048269017).

16643336263 is a wasteful number, since it uses less digits than its factorization.

16643336263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7986.

The product of its digits is 839808, while the sum is 43.

The spelling of 16643336263 in words is "sixteen billion, six hundred forty-three million, three hundred thirty-six thousand, two hundred sixty-three".