16618449 has 8 divisors (see below), whose sum is σ = 22872832. Its totient is φ = 10721520.

The previous prime is 16618447. The next prime is 16618451. The reversal of 16618449 is 94481661.

It is an interprime number because it is at equal distance from previous prime (16618447) and next prime (16618451).

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

It is not a de Polignac number, because 16618449 - 2¹ = 16618447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16618447) 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, 89254 + ... + 89439.

It is an arithmetic number, because the mean of its divisors is an integer number (2859104).

Almost surely, 2^16618449 is an apocalyptic number.

It is an amenable number.

16618449 is a deficient number, since it is larger than the sum of its proper divisors (6254383).

16618449 is a wasteful number, since it uses less digits than its factorization.

16618449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178727.

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

The square root of 16618449 is about 4076.5731932593. The cubic root of 16618449 is about 255.1899085133.

The spelling of 16618449 in words is "sixteen million, six hundred eighteen thousand, four hundred forty-nine".