12644101049 has 2 divisors, whose sum is σ = 12644101050. Its totient is φ = 12644101048.

The previous prime is 12644101003. The next prime is 12644101073. The reversal of 12644101049 is 94010144621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7984673449 + 4659427600 = 89357^2 + 68260^2 .

It is a cyclic number.

It is not a de Polignac number, because 12644101049 - 2⁸ = 12644100793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12644151049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322050524 + 6322050525.

It is an arithmetic number, because the mean of its divisors is an integer number (6322050525).

Almost surely, 2^12644101049 is an apocalyptic number.

It is an amenable number.

12644101049 is a deficient number, since it is larger than the sum of its proper divisors (1).

12644101049 is an equidigital number, since it uses as much as digits as its factorization.

12644101049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 12644101049 in words is "twelve billion, six hundred forty-four million, one hundred one thousand, forty-nine".