12688190470261 has 2 divisors, whose sum is σ = 12688190470262. Its totient is φ = 12688190470260.

The previous prime is 12688190470223. The next prime is 12688190470391. The reversal of 12688190470261 is 16207409188621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7231850424100 + 5456340046161 = 2689210^2 + 2335881^2 .

It is a cyclic number.

It is not a de Polignac number, because 12688190470261 - 2³³ = 12679600535669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12688100470261) 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 as a sum of consecutive naturals, namely, 6344095235130 + 6344095235131.

It is an arithmetic number, because the mean of its divisors is an integer number (6344095235131).

Almost surely, 2^{12688190470261} is an apocalyptic number.

It is an amenable number.

12688190470261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12688190470261 is an equidigital number, since it uses as much as digits as its factorization.

12688190470261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 12688190470261 in words is "twelve trillion, six hundred eighty-eight billion, one hundred ninety million, four hundred seventy thousand, two hundred sixty-one".