12385865636 has 6 divisors (see below), whose sum is σ = 21675264870. Its totient is φ = 6192932816.

The previous prime is 12385865629. The next prime is 12385865707. The reversal of 12385865636 is 63656858321.

It can be written as a sum of positive squares in only one way, i.e., 6285318400 + 6100547236 = 79280^2 + 78106^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1548233201 + ... + 1548233208.

It is an arithmetic number, because the mean of its divisors is an integer number (3612544145).

Almost surely, 2^12385865636 is an apocalyptic number.

It is an amenable number.

12385865636 is a deficient number, since it is larger than the sum of its proper divisors (9289399234).

12385865636 is a wasteful number, since it uses less digits than its factorization.

12385865636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096466413 (or 3096466411 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 53.

The spelling of 12385865636 in words is "twelve billion, three hundred eighty-five million, eight hundred sixty-five thousand, six hundred thirty-six".