12856066189 has 2 divisors, whose sum is σ = 12856066190. Its totient is φ = 12856066188.

The previous prime is 12856066147. The next prime is 12856066199. The reversal of 12856066189 is 98166065821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7971454089 + 4884612100 = 89283^2 + 69890^2 .

It is a cyclic number.

It is not a de Polignac number, because 12856066189 - 2¹³ = 12856057997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12856066199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6428033094 + 6428033095.

It is an arithmetic number, because the mean of its divisors is an integer number (6428033095).

Almost surely, 2^12856066189 is an apocalyptic number.

It is an amenable number.

12856066189 is a deficient number, since it is larger than the sum of its proper divisors (1).

12856066189 is an equidigital number, since it uses as much as digits as its factorization.

12856066189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 12856066189 in words is "twelve billion, eight hundred fifty-six million, sixty-six thousand, one hundred eighty-nine".