6444444442013 has 2 divisors, whose sum is σ = 6444444442014. Its totient is φ = 6444444442012.

The previous prime is 6444444441991. The next prime is 6444444442067. The reversal of 6444444442013 is 3102444444446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4929629956729 + 1514814485284 = 2220277^2 + 1230778^2 .

It is a cyclic number.

It is not a de Polignac number, because 6444444442013 - 2¹² = 6444444437917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6444444442913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222222221006 + 3222222221007.

It is an arithmetic number, because the mean of its divisors is an integer number (3222222221007).

Almost surely, 2^{6444444442013} is an apocalyptic number.

It is an amenable number.

6444444442013 is a deficient number, since it is larger than the sum of its proper divisors (1).

6444444442013 is an equidigital number, since it uses as much as digits as its factorization.

6444444442013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2359296, while the sum is 44.

Adding to 6444444442013 its reverse (3102444444446), we get a palindrome (9546888886459).

The spelling of 6444444442013 in words is "six trillion, four hundred forty-four billion, four hundred forty-four million, four hundred forty-two thousand, thirteen".