11805474409 has 9 divisors (see below), whose sum is σ = 11891385597. Its totient is φ = 11720181804.

The previous prime is 11805474403. The next prime is 11805474413. The reversal of 11805474409 is 90447450811.

The square root of 11805474409 is 108653.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-11805474409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11805474403) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19448584 + ... + 19449190.

Almost surely, 2^11805474409 is an apocalyptic number.

11805474409 is the 108653-rd square number.

11805474409 is the 54327-th centered octagonal number.

It is an amenable number.

11805474409 is a deficient number, since it is larger than the sum of its proper divisors (85911188).

11805474409 is an frugal number, since it uses more digits than its factorization.

11805474409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 11805474409 in words is "eleven billion, eight hundred five million, four hundred seventy-four thousand, four hundred nine".