16144661 has 16 divisors (see below), whose sum is σ = 18459840. Its totient is φ = 13996800.

The previous prime is 16144637. The next prime is 16144673. The reversal of 16144661 is 16644161.

It is a cyclic number.

It is not a de Polignac number, because 16144661 - 2¹⁰ = 16143637 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16144631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40061 + ... + 40461.

It is an arithmetic number, because the mean of its divisors is an integer number (1153740).

Almost surely, 2^16144661 is an apocalyptic number.

It is an amenable number.

16144661 is a deficient number, since it is larger than the sum of its proper divisors (2315179).

16144661 is a wasteful number, since it uses less digits than its factorization.

16144661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596.

The product of its digits is 3456, while the sum is 29.

The square root of 16144661 is about 4018.0419360679. The cubic root of 16144661 is about 252.7413553429.

Subtracting 16144661 from its reverse (16644161), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 16144661 in words is "sixteen million, one hundred forty-four thousand, six hundred sixty-one".