12643012405 has 16 divisors (see below), whose sum is σ = 15706840320. Its totient is φ = 9758129472.

The previous prime is 12643012373. The next prime is 12643012411. The reversal of 12643012405 is 50421034621.

It is a cyclic number.

It is not a de Polignac number, because 12643012405 - 2⁵ = 12643012373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159562 + ... + 225268.

It is an arithmetic number, because the mean of its divisors is an integer number (981677520).

Almost surely, 2^12643012405 is an apocalyptic number.

It is an amenable number.

12643012405 is a deficient number, since it is larger than the sum of its proper divisors (3063827915).

12643012405 is a wasteful number, since it uses less digits than its factorization.

12643012405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67068.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 12643012405 in words is "twelve billion, six hundred forty-three million, twelve thousand, four hundred five".