16613221568 has 28 divisors (see below), whose sum is σ = 33364063320. Its totient is φ = 8206528512.

The previous prime is 16613221549. The next prime is 16613221601. The reversal of 16613221568 is 86512231661.

16613221568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 1558433 + ... + 1569056.

It is an arithmetic number, because the mean of its divisors is an integer number (1191573690).

Almost surely, 2^16613221568 is an apocalyptic number.

It is an amenable number.

16613221568 is an abundant number, since it is smaller than the sum of its proper divisors (16750841752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16613221568 is an equidigital number, since it uses as much as digits as its factorization.

16613221568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3127584 (or 3127574 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The spelling of 16613221568 in words is "sixteen billion, six hundred thirteen million, two hundred twenty-one thousand, five hundred sixty-eight".