1042644361309 has 2 divisors, whose sum is σ = 1042644361310. Its totient is φ = 1042644361308.

The previous prime is 1042644361243. The next prime is 1042644361327. The reversal of 1042644361309 is 9031634462401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1042369531225 + 274830084 = 1020965^2 + 16578^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042644361309 - 2¹⁵ = 1042644328541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042644361379) 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 as a sum of consecutive naturals, namely, 521322180654 + 521322180655.

It is an arithmetic number, because the mean of its divisors is an integer number (521322180655).

Almost surely, 2^{1042644361309} is an apocalyptic number.

It is an amenable number.

1042644361309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042644361309 is an equidigital number, since it uses as much as digits as its factorization.

1042644361309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 1042644361309 in words is "one trillion, forty-two billion, six hundred forty-four million, three hundred sixty-one thousand, three hundred nine".