16616589 has 32 divisors (see below), whose sum is σ = 25681920. Its totient is φ = 9460800.

The previous prime is 16616581. The next prime is 16616597. The reversal of 16616589 is 98561661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16616581) and next prime (16616597).

It is not a de Polignac number, because 16616589 - 2³ = 16616581 is a prime.

It is a super-2 number, since 2×16616589² = 552222059989842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16616589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16616581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37632 + ... + 38070.

It is an arithmetic number, because the mean of its divisors is an integer number (802560).

Almost surely, 2^16616589 is an apocalyptic number.

It is an amenable number.

16616589 is a deficient number, since it is larger than the sum of its proper divisors (9065331).

16616589 is a wasteful number, since it uses less digits than its factorization.

16616589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its digits is 77760, while the sum is 42.

The square root of 16616589 is about 4076.3450540895. The cubic root of 16616589 is about 255.1803875498.

It can be divided in two parts, 16616 and 589, that added together give a triangular number (17205 = T₁₈₅).

The spelling of 16616589 in words is "sixteen million, six hundred sixteen thousand, five hundred eighty-nine".