16564703665444 has 24 divisors (see below), whose sum is σ = 31624264784448. Its totient is φ = 7529234660640.

The previous prime is 16564703665423. The next prime is 16564703665501. The reversal of 16564703665444 is 44456630746561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2490379 + ... + 6271474.

It is an arithmetic number, because the mean of its divisors is an integer number (1317677699352).

Almost surely, 2^{16564703665444} is an apocalyptic number.

It is an amenable number.

16564703665444 is a deficient number, since it is larger than the sum of its proper divisors (15059561119004).

16564703665444 is a wasteful number, since it uses less digits than its factorization.

16564703665444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8804835 (or 8804833 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 61.

The spelling of 16564703665444 in words is "sixteen trillion, five hundred sixty-four billion, seven hundred three million, six hundred sixty-five thousand, four hundred forty-four".