4144145209 has 4 divisors (see below), whose sum is σ = 4153135140. Its totient is φ = 4135155280.

The previous prime is 4144145189. The next prime is 4144145219. The reversal of 4144145209 is 9025414414.

It is a happy number.

4144145209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1953905209 + 2190240000 = 44203^2 + 46800^2 .

It is a cyclic number.

It is not a de Polignac number, because 4144145209 - 2⁵ = 4144145177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4144145219) 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, 4494274 + ... + 4495195.

It is an arithmetic number, because the mean of its divisors is an integer number (1038283785).

Almost surely, 2^4144145209 is an apocalyptic number.

It is an amenable number.

4144145209 is a deficient number, since it is larger than the sum of its proper divisors (8989931).

4144145209 is an equidigital number, since it uses as much as digits as its factorization.

4144145209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8989930.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 4144145209 is about 64375.0356038736. The cubic root of 4144145209 is about 1606.2445045682.

The spelling of 4144145209 in words is "four billion, one hundred forty-four million, one hundred forty-five thousand, two hundred nine".