1444047473509 has 2 divisors, whose sum is σ = 1444047473510. Its totient is φ = 1444047473508.

The previous prime is 1444047473507. The next prime is 1444047473569. The reversal of 1444047473509 is 9053747404441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1433101082884 + 10946390625 = 1197122^2 + 104625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444047473509 - 2¹ = 1444047473507 is a prime.

Together with 1444047473507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1444047473501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722023736754 + 722023736755.

It is an arithmetic number, because the mean of its divisors is an integer number (722023736755).

Almost surely, 2^{1444047473509} is an apocalyptic number.

It is an amenable number.

1444047473509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444047473509 is an equidigital number, since it uses as much as digits as its factorization.

1444047473509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 52.

The spelling of 1444047473509 in words is "one trillion, four hundred forty-four billion, forty-seven million, four hundred seventy-three thousand, five hundred nine".