3804561509 has 4 divisors (see below), whose sum is σ = 4348070304. Its totient is φ = 3261052716.

The previous prime is 3804561473. The next prime is 3804561511. The reversal of 3804561509 is 9051654083.

3804561509 is digitally balanced in base 3, 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9051654083 = 33577 ⋅269579.

It is a cyclic number.

It is not a de Polignac number, because 3804561509 - 2¹⁶ = 3804495973 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 (3804561589) 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, 271754387 + ... + 271754400.

It is an arithmetic number, because the mean of its divisors is an integer number (1087017576).

Almost surely, 2^3804561509 is an apocalyptic number.

It is an amenable number.

3804561509 is a deficient number, since it is larger than the sum of its proper divisors (543508795).

3804561509 is an equidigital number, since it uses as much as digits as its factorization.

3804561509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543508794.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 3804561509 is about 61681.1276566828. The cubic root of 3804561509 is about 1561.1149038906.

The spelling of 3804561509 in words is "three billion, eight hundred four million, five hundred sixty-one thousand, five hundred nine".