4509381609 has 6 divisors (see below), whose sum is σ = 6513551226. Its totient is φ = 3006254400.

The previous prime is 4509381589. The next prime is 4509381619. The reversal of 4509381609 is 9061839054.

It is a happy number.

4509381609 is a `hidden beast` number, since 4 + 5 + 0 + 9 + 38 + 1 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3555498384 + 953883225 = 59628^2 + 30885^2 .

It is not a de Polignac number, because 4509381609 - 2¹¹ = 4509379561 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4509381619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 250521192 + ... + 250521209.

It is an arithmetic number, because the mean of its divisors is an integer number (1085591871).

Almost surely, 2^4509381609 is an apocalyptic number.

It is an amenable number.

4509381609 is a deficient number, since it is larger than the sum of its proper divisors (2004169617).

4509381609 is a wasteful number, since it uses less digits than its factorization.

4509381609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501042407 (or 501042404 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 4509381609 is about 67151.9293021429. The cubic root of 4509381609 is about 1652.1101388196.

The spelling of 4509381609 in words is "four billion, five hundred nine million, three hundred eighty-one thousand, six hundred nine".