12768235209638 has 4 divisors (see below), whose sum is σ = 19152352814460. Its totient is φ = 6384117604818.

The previous prime is 12768235209577. The next prime is 12768235209671. The reversal of 12768235209638 is 83690253286721.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3192058802408 + ... + 3192058802411.

It is an arithmetic number, because the mean of its divisors is an integer number (4788088203615).

Almost surely, 2^{12768235209638} is an apocalyptic number.

12768235209638 is a deficient number, since it is larger than the sum of its proper divisors (6384117604822).

12768235209638 is an equidigital number, since it uses as much as digits as its factorization.

12768235209638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6384117604821.

The product of its (nonzero) digits is 52254720, while the sum is 62.

The spelling of 12768235209638 in words is "twelve trillion, seven hundred sixty-eight billion, two hundred thirty-five million, two hundred nine thousand, six hundred thirty-eight".