12681655180189 has 4 divisors (see below), whose sum is σ = 12683403657756. Its totient is φ = 12679906702624.

The previous prime is 12681655180151. The next prime is 12681655180193. The reversal of 12681655180189 is 98108155618621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10154642623225 + 2527012556964 = 3186635^2 + 1589658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12681655180189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12681655160189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874227904 + ... + 874242409.

It is an arithmetic number, because the mean of its divisors is an integer number (3170850914439).

Almost surely, 2^{12681655180189} is an apocalyptic number.

It is an amenable number.

12681655180189 is a deficient number, since it is larger than the sum of its proper divisors (1748477567).

12681655180189 is an equidigital number, since it uses as much as digits as its factorization.

12681655180189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748477566.

The product of its (nonzero) digits is 8294400, while the sum is 61.

The spelling of 12681655180189 in words is "twelve trillion, six hundred eighty-one billion, six hundred fifty-five million, one hundred eighty thousand, one hundred eighty-nine".