16644188384003 has 2 divisors, whose sum is σ = 16644188384004. Its totient is φ = 16644188384002.

The previous prime is 16644188383987. The next prime is 16644188384011. The reversal of 16644188384003 is 30048388144661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16644188384003 - 2⁴ = 16644188383987 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16644188384003.

It is not a weakly prime, because it can be changed into another prime (16644188384053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8322094192001 + 8322094192002.

It is an arithmetic number, because the mean of its divisors is an integer number (8322094192002).

Almost surely, 2^{16644188384003} is an apocalyptic number.

16644188384003 is a deficient number, since it is larger than the sum of its proper divisors (1).

16644188384003 is an equidigital number, since it uses as much as digits as its factorization.

16644188384003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 16644188384003 in words is "sixteen trillion, six hundred forty-four billion, one hundred eighty-eight million, three hundred eighty-four thousand, three".