744344831981 has 2 divisors, whose sum is σ = 744344831982. Its totient is φ = 744344831980.

The previous prime is 744344831977. The next prime is 744344832071. The reversal of 744344831981 is 189138443447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 742166743081 + 2178088900 = 861491^2 + 46670^2 .

It is a cyclic number.

It is not a de Polignac number, because 744344831981 - 2² = 744344831977 is a prime.

It is a super-2 number, since 2×744344831981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744344831281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372172415990 + 372172415991.

It is an arithmetic number, because the mean of its divisors is an integer number (372172415991).

Almost surely, 2^744344831981 is an apocalyptic number.

It is an amenable number.

744344831981 is a deficient number, since it is larger than the sum of its proper divisors (1).

744344831981 is an equidigital number, since it uses as much as digits as its factorization.

744344831981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9289728, while the sum is 56.

The spelling of 744344831981 in words is "seven hundred forty-four billion, three hundred forty-four million, eight hundred thirty-one thousand, nine hundred eighty-one".