16221626459 has 4 divisors (see below), whose sum is σ = 16248618120. Its totient is φ = 16194634800.

The previous prime is 16221626437. The next prime is 16221626467. The reversal of 16221626459 is 95462612261.

16221626459 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16221626459 - 2¹⁶ = 16221560923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16221623459) 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 in 3 ways as a sum of consecutive naturals, for example, 13494929 + ... + 13496130.

It is an arithmetic number, because the mean of its divisors is an integer number (4062154530).

Almost surely, 2^16221626459 is an apocalyptic number.

16221626459 is a deficient number, since it is larger than the sum of its proper divisors (26991661).

16221626459 is an equidigital number, since it uses as much as digits as its factorization.

16221626459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26991660.

The product of its digits is 311040, while the sum is 44.

The spelling of 16221626459 in words is "sixteen billion, two hundred twenty-one million, six hundred twenty-six thousand, four hundred fifty-nine".