16559641 has 8 divisors (see below), whose sum is σ = 19103040. Its totient is φ = 14060688.

The previous prime is 16559629. The next prime is 16559671. The reversal of 16559641 is 14695561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16559641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16559641.

It is not an unprimeable number, because it can be changed into a prime (16559671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10306 + ... + 11803.

It is an arithmetic number, because the mean of its divisors is an integer number (2387880).

Almost surely, 2^16559641 is an apocalyptic number.

It is an amenable number.

16559641 is a deficient number, since it is larger than the sum of its proper divisors (2543399).

16559641 is a wasteful number, since it uses less digits than its factorization.

16559641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22223.

The product of its digits is 32400, while the sum is 37.

The square root of 16559641 is about 4069.3538799175. The cubic root of 16559641 is about 254.8885377273. Note that the first 3 decimals are identical.

The spelling of 16559641 in words is "sixteen million, five hundred fifty-nine thousand, six hundred forty-one".