12386549419209 has 27 divisors (see below), whose sum is σ = 20812897701063. Its totient is φ = 7077986006112.

The previous prime is 12386549419199. The next prime is 12386549419213. The reversal of 12386549419209 is 90291494568321.

The square root of 12386549419209 is 3519453.

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

12386549419209 is a `hidden beast` number, since 1 + 2 + 3 + 8 + 6 + 5 + 4 + 9 + 419 + 209 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10901387975625 + 1485161443584 = 3301725^2 + 1218672^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12386549419209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (12386549419219) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 73824717 + ... + 73992309.

Almost surely, 2^{12386549419209} is an apocalyptic number.

12386549419209 is the 3519453-rd square number.

12386549419209 is the 1759727-th centered octagonal number.

It is an amenable number.

12386549419209 is a deficient number, since it is larger than the sum of its proper divisors (8426348281854).

12386549419209 is an frugal number, since it uses more digits than its factorization.

12386549419209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335206 (or 167603 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 63.

The spelling of 12386549419209 in words is "twelve trillion, three hundred eighty-six billion, five hundred forty-nine million, four hundred nineteen thousand, two hundred nine".