16380391609 has 2 divisors, whose sum is σ = 16380391610. Its totient is φ = 16380391608.

The previous prime is 16380391603. The next prime is 16380391631. The reversal of 16380391609 is 90619308361.

16380391609 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., 14112727209 + 2267664400 = 118797^2 + 47620^2 .

It is an emirp because it is prime and its reverse (90619308361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16380391609 - 2¹¹ = 16380389561 is a prime.

It is not a weakly prime, because it can be changed into another prime (16380391603) 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, 8190195804 + 8190195805.

It is an arithmetic number, because the mean of its divisors is an integer number (8190195805).

Almost surely, 2^16380391609 is an apocalyptic number.

It is an amenable number.

16380391609 is a deficient number, since it is larger than the sum of its proper divisors (1).

16380391609 is an equidigital number, since it uses as much as digits as its factorization.

16380391609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 16380391609 in words is "sixteen billion, three hundred eighty million, three hundred ninety-one thousand, six hundred nine".