16221986558 has 16 divisors (see below), whose sum is σ = 24691706880. Its totient is φ = 7991840376.

The previous prime is 16221986537. The next prime is 16221986579. The reversal of 16221986558 is 85568912261.

It is an interprime number because it is at equal distance from previous prime (16221986537) and next prime (16221986579).

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28466 + ... + 182357.

It is an arithmetic number, because the mean of its divisors is an integer number (1543231680).

Almost surely, 2^16221986558 is an apocalyptic number.

16221986558 is a deficient number, since it is larger than the sum of its proper divisors (8469720322).

16221986558 is a wasteful number, since it uses less digits than its factorization.

16221986558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211391.

The product of its digits is 2073600, while the sum is 53.

The spelling of 16221986558 in words is "sixteen billion, two hundred twenty-one million, nine hundred eighty-six thousand, five hundred fifty-eight".