12532130809 has 9 divisors (see below), whose sum is σ = 13776340431. Its totient is φ = 11391726720.

The previous prime is 12532130801. The next prime is 12532130833. The reversal of 12532130809 is 90803123521.

The square root of 12532130809 is 111947.

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

It can be written as a sum of positive squares in only one way, i.e., 8245548025 + 4286582784 = 90805^2 + 65472^2 .

It is not a de Polignac number, because 12532130809 - 2³ = 12532130801 is a prime.

It is a super-2 number, since 2×12532130809² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12532130801) 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, 1226329 + ... + 1236505.

Almost surely, 2^12532130809 is an apocalyptic number.

12532130809 is the 111947-th square number.

12532130809 is the 55974-th centered octagonal number.

It is an amenable number.

12532130809 is a deficient number, since it is larger than the sum of its proper divisors (1244209622).

12532130809 is an frugal number, since it uses more digits than its factorization.

12532130809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20376 (or 10188 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

It can be divided in two parts, 12532 and 130809, that added together give a palindrome (143341).

The spelling of 12532130809 in words is "twelve billion, five hundred thirty-two million, one hundred thirty thousand, eight hundred nine".