4418185409 has 24 divisors (see below), whose sum is σ = 5106417960. Its totient is φ = 3814272000.

The previous prime is 4418185397. The next prime is 4418185439. The reversal of 4418185409 is 9045818144.

It can be written as a sum of positive squares in 4 ways, for example, as 33097009 + 4385088400 = 5753^2 + 66220^2 .

It is not a de Polignac number, because 4418185409 - 2⁸ = 4418185153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4418185409.

It is not an unprimeable number, because it can be changed into a prime (4418185439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203729 + ... + 224369.

It is an arithmetic number, because the mean of its divisors is an integer number (212767415).

Almost surely, 2^4418185409 is an apocalyptic number.

It is an amenable number.

4418185409 is a deficient number, since it is larger than the sum of its proper divisors (688232551).

4418185409 is a wasteful number, since it uses less digits than its factorization.

4418185409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20753 (or 20742 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 4418185409 is about 66469.4321398942. The cubic root of 4418185409 is about 1640.8969673174.

The spelling of 4418185409 in words is "four billion, four hundred eighteen million, one hundred eighty-five thousand, four hundred nine".