12636432245 has 4 divisors (see below), whose sum is σ = 15163718700. Its totient is φ = 10109145792.

The previous prime is 12636432241. The next prime is 12636432251. The reversal of 12636432245 is 54223463621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4187513521 + 8448918724 = 64711^2 + 91918^2 .

It is a cyclic number.

It is not a de Polignac number, because 12636432245 - 2² = 12636432241 is a prime.

It is a super-3 number, since 3×12636432245³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12636432199 and 12636432208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12636432241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1263643220 + ... + 1263643229.

It is an arithmetic number, because the mean of its divisors is an integer number (3790929675).

Almost surely, 2^12636432245 is an apocalyptic number.

It is an amenable number.

12636432245 is a deficient number, since it is larger than the sum of its proper divisors (2527286455).

12636432245 is an equidigital number, since it uses as much as digits as its factorization.

12636432245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527286454.

The product of its digits is 207360, while the sum is 38.

Adding to 12636432245 its reverse (54223463621), we get a palindrome (66859895866).

The spelling of 12636432245 in words is "twelve billion, six hundred thirty-six million, four hundred thirty-two thousand, two hundred forty-five".