16219550609 has 2 divisors, whose sum is σ = 16219550610. Its totient is φ = 16219550608.

The previous prime is 16219550603. The next prime is 16219550617. The reversal of 16219550609 is 90605591261.

16219550609 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., 16165851025 + 53699584 = 127145^2 + 7328^2 .

It is an emirp because it is prime and its reverse (90605591261) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16219550609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16219550609.

It is not a weakly prime, because it can be changed into another prime (16219550603) 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, 8109775304 + 8109775305.

It is an arithmetic number, because the mean of its divisors is an integer number (8109775305).

Almost surely, 2^16219550609 is an apocalyptic number.

It is an amenable number.

16219550609 is a deficient number, since it is larger than the sum of its proper divisors (1).

16219550609 is an equidigital number, since it uses as much as digits as its factorization.

16219550609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 44.

The spelling of 16219550609 in words is "sixteen billion, two hundred nineteen million, five hundred fifty thousand, six hundred nine".