12665113245 has 24 divisors (see below), whose sum is σ = 21961767672. Its totient is φ = 6751987200.

The previous prime is 12665113193. The next prime is 12665113249. The reversal of 12665113245 is 54231156621.

12665113245 is a `hidden beast` number, since 12 + 66 + 511 + 32 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 270076356 + 12395036889 = 16434^2 + 111333^2 .

It is not a de Polignac number, because 12665113245 - 2⁷ = 12665113117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665113249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57625 + ... + 169265.

It is an arithmetic number, because the mean of its divisors is an integer number (915073653).

Almost surely, 2^12665113245 is an apocalyptic number.

12665113245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12665113245 is a deficient number, since it is larger than the sum of its proper divisors (9296654427).

12665113245 is a wasteful number, since it uses less digits than its factorization.

12665113245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114173 (or 114170 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

Adding to 12665113245 its reverse (54231156621), we get a palindrome (66896269866).

The spelling of 12665113245 in words is "twelve billion, six hundred sixty-five million, one hundred thirteen thousand, two hundred forty-five".