16655389 has 8 divisors (see below), whose sum is σ = 17136000. Its totient is φ = 16178400.

The previous prime is 16655383. The next prime is 16655407. The reversal of 16655389 is 98355661.

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

It is a cyclic number.

It is not a de Polignac number, because 16655389 - 2⁵ = 16655357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16655383) 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 7 ways as a sum of consecutive naturals, for example, 10362 + ... + 11860.

It is an arithmetic number, because the mean of its divisors is an integer number (2142000).

Almost surely, 2^16655389 is an apocalyptic number.

It is an amenable number.

16655389 is a deficient number, since it is larger than the sum of its proper divisors (480611).

16655389 is a wasteful number, since it uses less digits than its factorization.

16655389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811.

The product of its digits is 194400, while the sum is 43.

The square root of 16655389 is about 4081.1014444632. The cubic root of 16655389 is about 255.3788499155.

It can be divided in two parts, 166 and 55389, that added together give a palindrome (55555).

The spelling of 16655389 in words is "sixteen million, six hundred fifty-five thousand, three hundred eighty-nine".