16641489 has 16 divisors (see below), whose sum is σ = 23248512. Its totient is φ = 10568448.

The previous prime is 16641461. The next prime is 16641491. The reversal of 16641489 is 98414661.

It is not a de Polignac number, because 16641489 - 2¹⁶ = 16575953 is a prime.

It is a super-2 number, since 2×16641489² = 553878312274242, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16641439) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 29599 + ... + 30155.

It is an arithmetic number, because the mean of its divisors is an integer number (1453032).

Almost surely, 2^16641489 is an apocalyptic number.

It is an amenable number.

16641489 is a deficient number, since it is larger than the sum of its proper divisors (6607023).

16641489 is a wasteful number, since it uses less digits than its factorization.

16641489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016.

The product of its digits is 41472, while the sum is 39.

The square root of 16641489 is about 4079.3981173698. The cubic root of 16641489 is about 255.3077867504.

The spelling of 16641489 in words is "sixteen million, six hundred forty-one thousand, four hundred eighty-nine".