12678836081 has 2 divisors, whose sum is σ = 12678836082. Its totient is φ = 12678836080.

The previous prime is 12678836017. The next prime is 12678836099. The reversal of 12678836081 is 18063887621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7141095025 + 5537741056 = 84505^2 + 74416^2 .

It is a cyclic number.

It is not a de Polignac number, because 12678836081 - 2⁶ = 12678836017 is a prime.

It is a super-2 number, since 2×12678836081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12678836281) 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, 6339418040 + 6339418041.

It is an arithmetic number, because the mean of its divisors is an integer number (6339418041).

Almost surely, 2^12678836081 is an apocalyptic number.

It is an amenable number.

12678836081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12678836081 is an equidigital number, since it uses as much as digits as its factorization.

12678836081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 12678836081 in words is "twelve billion, six hundred seventy-eight million, eight hundred thirty-six thousand, eighty-one".