12643033455 has 24 divisors (see below), whose sum is σ = 23600330208. Its totient is φ = 6224262336.

The previous prime is 12643033439. The next prime is 12643033457. The reversal of 12643033455 is 55433034621.

12643033455 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 303 + 345 + 5 = 666.

It is not a de Polignac number, because 12643033455 - 2⁴ = 12643033439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643033457) 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, 10805427 + ... + 10806596.

It is an arithmetic number, because the mean of its divisors is an integer number (983347092).

Almost surely, 2^12643033455 is an apocalyptic number.

12643033455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12643033455 is a deficient number, since it is larger than the sum of its proper divisors (10957296753).

12643033455 is a wasteful number, since it uses less digits than its factorization.

12643033455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21612047 (or 21612044 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The spelling of 12643033455 in words is "twelve billion, six hundred forty-three million, thirty-three thousand, four hundred fifty-five".