16445149 has 4 divisors (see below), whose sum is σ = 18794464. Its totient is φ = 14095836.

The previous prime is 16445119. The next prime is 16445167. The reversal of 16445149 is 94154461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16445149 - 2¹¹ = 16443101 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 (16445119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1174647 + ... + 1174660.

It is an arithmetic number, because the mean of its divisors is an integer number (4698616).

Almost surely, 2^16445149 is an apocalyptic number.

It is an amenable number.

16445149 is a deficient number, since it is larger than the sum of its proper divisors (2349315).

16445149 is an equidigital number, since it uses as much as digits as its factorization.

16445149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349314.

The product of its digits is 17280, while the sum is 34.

The square root of 16445149 is about 4055.2618904332. The cubic root of 16445149 is about 254.2997525480.

The spelling of 16445149 in words is "sixteen million, four hundred forty-five thousand, one hundred forty-nine".