12688443692271 has 40 divisors (see below), whose sum is σ = 20026110178800. Its totient is φ = 7983962743680.

The previous prime is 12688443692209. The next prime is 12688443692317. The reversal of 12688443692271 is 17229634488621.

12688443692271 is a `hidden beast` number, since 1 + 2 + 6 + 8 + 8 + 44 + 369 + 227 + 1 = 666.

It is not a de Polignac number, because 12688443692271 - 2⁶ = 12688443692207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12688443692199 and 12688443692208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688443692671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14910550 + ... + 15738531.

It is an arithmetic number, because the mean of its divisors is an integer number (500652754470).

Almost surely, 2^{12688443692271} is an apocalyptic number.

12688443692271 is a deficient number, since it is larger than the sum of its proper divisors (7337666486529).

12688443692271 is a wasteful number, since it uses less digits than its factorization.

12688443692271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30649381 (or 30649372 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 12688443692271 in words is "twelve trillion, six hundred eighty-eight billion, four hundred forty-three million, six hundred ninety-two thousand, two hundred seventy-one".