12643653136 has 15 divisors (see below), whose sum is σ = 24497949423. Its totient is φ = 6321601680.

The previous prime is 12643653133. The next prime is 12643653137. The reversal of 12643653136 is 63135634621.

The square root of 12643653136 is 112444.

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

12643653136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12643653133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 435721 + ... + 463831.

Almost surely, 2^12643653136 is an apocalyptic number.

12643653136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

12643653136 is the 112444-th square number.

It is an amenable number.

12643653136 is a deficient number, since it is larger than the sum of its proper divisors (11854296287).

12643653136 is an frugal number, since it uses more digits than its factorization.

12643653136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56230 (or 28113 counting only the distinct ones).

The product of its digits is 233280, while the sum is 40.

The spelling of 12643653136 in words is "twelve billion, six hundred forty-three million, six hundred fifty-three thousand, one hundred thirty-six".