12644101073 has 2 divisors, whose sum is σ = 12644101074. Its totient is φ = 12644101072.

The previous prime is 12644101049. The next prime is 12644101091. The reversal of 12644101073 is 37010144621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12393923584 + 250177489 = 111328^2 + 15817^2 .

It is an emirp because it is prime and its reverse (37010144621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12644101073 - 2¹² = 12644096977 is a prime.

It is not a weakly prime, because it can be changed into another prime (12644101003) 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, 6322050536 + 6322050537.

It is an arithmetic number, because the mean of its divisors is an integer number (6322050537).

Almost surely, 2^12644101073 is an apocalyptic number.

It is an amenable number.

12644101073 is a deficient number, since it is larger than the sum of its proper divisors (1).

12644101073 is an equidigital number, since it uses as much as digits as its factorization.

12644101073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 12644101073 its reverse (37010144621), we get a palindrome (49654245694).

The spelling of 12644101073 in words is "twelve billion, six hundred forty-four million, one hundred one thousand, seventy-three".