12642661644733 has 2 divisors, whose sum is σ = 12642661644734. Its totient is φ = 12642661644732.

The previous prime is 12642661644713. The next prime is 12642661644829. The reversal of 12642661644733 is 33744616624621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11968091817049 + 674569827684 = 3459493^2 + 821322^2 .

It is a cyclic number.

It is not a de Polignac number, because 12642661644733 - 2¹³ = 12642661636541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12642661644713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321330822366 + 6321330822367.

It is an arithmetic number, because the mean of its divisors is an integer number (6321330822367).

Almost surely, 2^{12642661644733} is an apocalyptic number.

It is an amenable number.

12642661644733 is a deficient number, since it is larger than the sum of its proper divisors (1).

12642661644733 is an equidigital number, since it uses as much as digits as its factorization.

12642661644733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20901888, while the sum is 55.

The spelling of 12642661644733 in words is "twelve trillion, six hundred forty-two billion, six hundred sixty-one million, six hundred forty-four thousand, seven hundred thirty-three".