12644101005 has 16 divisors (see below), whose sum is σ = 20384996544. Its totient is φ = 6692042240.

The previous prime is 12644101003. The next prime is 12644101049. The reversal of 12644101005 is 50010144621.

It is a happy number.

It is not a de Polignac number, because 12644101005 - 2¹ = 12644101003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a 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 in 15 ways as a sum of consecutive naturals, for example, 3215364 + ... + 3219293.

It is an arithmetic number, because the mean of its divisors is an integer number (1274062284).

Almost surely, 2^12644101005 is an apocalyptic number.

12644101005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12644101005 is a deficient number, since it is larger than the sum of its proper divisors (7740895539).

12644101005 is a wasteful number, since it uses less digits than its factorization.

12644101005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6434796.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 12644101005 its reverse (50010144621), we get a palindrome (62654245626).

The spelling of 12644101005 in words is "twelve billion, six hundred forty-four million, one hundred one thousand, five".