12396532661 has 2 divisors, whose sum is σ = 12396532662. Its totient is φ = 12396532660.

The previous prime is 12396532649. The next prime is 12396532669. The reversal of 12396532661 is 16623569321.

12396532661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11380835761 + 1015696900 = 106681^2 + 31870^2 .

It is an emirp because it is prime and its reverse (16623569321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12396532661 - 2⁶ = 12396532597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12396532669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6198266330 + 6198266331.

It is an arithmetic number, because the mean of its divisors is an integer number (6198266331).

Almost surely, 2^12396532661 is an apocalyptic number.

It is an amenable number.

12396532661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12396532661 is an equidigital number, since it uses as much as digits as its factorization.

12396532661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 44.

The spelling of 12396532661 in words is "twelve billion, three hundred ninety-six million, five hundred thirty-two thousand, six hundred sixty-one".