12638054854657 has 4 divisors (see below), whose sum is σ = 12638068513200. Its totient is φ = 12638041196116.

The previous prime is 12638054854643. The next prime is 12638054854679. The reversal of 12638054854657 is 75645845083621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12638054854657 - 2¹¹ = 12638054852609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12638054854697) 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 3 ways as a sum of consecutive naturals, for example, 5331907 + ... + 7328392.

It is an arithmetic number, because the mean of its divisors is an integer number (3159517128300).

Almost surely, 2^{12638054854657} is an apocalyptic number.

It is an amenable number.

12638054854657 is a deficient number, since it is larger than the sum of its proper divisors (13658543).

12638054854657 is an equidigital number, since it uses as much as digits as its factorization.

12638054854657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13658542.

The product of its (nonzero) digits is 193536000, while the sum is 64.

The spelling of 12638054854657 in words is "twelve trillion, six hundred thirty-eight billion, fifty-four million, eight hundred fifty-four thousand, six hundred fifty-seven".