126322665617 has 2 divisors, whose sum is σ = 126322665618. Its totient is φ = 126322665616.

The previous prime is 126322665541. The next prime is 126322665619. The reversal of 126322665617 is 716566223621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112745522176 + 13577143441 = 335776^2 + 116521^2 .

It is a cyclic number.

It is not a de Polignac number, because 126322665617 - 2¹⁰ = 126322664593 is a prime.

Together with 126322665619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126322665619) 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, 63161332808 + 63161332809.

It is an arithmetic number, because the mean of its divisors is an integer number (63161332809).

Almost surely, 2^126322665617 is an apocalyptic number.

It is an amenable number.

126322665617 is a deficient number, since it is larger than the sum of its proper divisors (1).

126322665617 is an equidigital number, since it uses as much as digits as its factorization.

126322665617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 47.

The spelling of 126322665617 in words is "one hundred twenty-six billion, three hundred twenty-two million, six hundred sixty-five thousand, six hundred seventeen".