11931848289 has 45 divisors (see below), whose sum is σ = 18246445833. Its totient is φ = 7770398688.

The previous prime is 11931848237. The next prime is 11931848317. The reversal of 11931848289 is 98284813911.

It is a happy number.

The square root of 11931848289 is 109233.

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

11931848289 is a `hidden beast` number, since 1 + 1 + 9 + 318 + 48 + 289 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5533128225 + 6398720064 = 74385^2 + 79992^2 .

It is not a de Polignac number, because 11931848289 - 2⁹ = 11931847777 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

Its product of digits (995328) is a multiple of the sum of its prime factors (576).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11931848219) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 52104027 + ... + 52104255.

Almost surely, 2^11931848289 is an apocalyptic number.

11931848289 is the 109233-rd square number.

11931848289 is the 54617-th centered octagonal number.

It is an amenable number.

11931848289 is a deficient number, since it is larger than the sum of its proper divisors (6314597544).

11931848289 is an frugal number, since it uses more digits than its factorization.

11931848289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 285 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The spelling of 11931848289 in words is "eleven billion, nine hundred thirty-one million, eight hundred forty-eight thousand, two hundred eighty-nine".