12645488197 has 2 divisors, whose sum is σ = 12645488198. Its totient is φ = 12645488196.

The previous prime is 12645488189. The next prime is 12645488237. The reversal of 12645488197 is 79188454621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12265784001 + 379704196 = 110751^2 + 19486^2 .

It is a cyclic number.

It is not a de Polignac number, because 12645488197 - 2³ = 12645488189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12645488497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322744098 + 6322744099.

It is an arithmetic number, because the mean of its divisors is an integer number (6322744099).

Almost surely, 2^12645488197 is an apocalyptic number.

It is an amenable number.

12645488197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12645488197 is an equidigital number, since it uses as much as digits as its factorization.

12645488197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 55.

The spelling of 12645488197 in words is "twelve billion, six hundred forty-five million, four hundred eighty-eight thousand, one hundred ninety-seven".