1344781235789 has 2 divisors, whose sum is σ = 1344781235790. Its totient is φ = 1344781235788.

The previous prime is 1344781235783. The next prime is 1344781235803. The reversal of 1344781235789 is 9875321874431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 834056613289 + 510724622500 = 913267^2 + 714650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344781235789 - 2¹² = 1344781231693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344781235783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672390617894 + 672390617895.

It is an arithmetic number, because the mean of its divisors is an integer number (672390617895).

Almost surely, 2^{1344781235789} is an apocalyptic number.

It is an amenable number.

1344781235789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344781235789 is an equidigital number, since it uses as much as digits as its factorization.

1344781235789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 62.

The spelling of 1344781235789 in words is "one trillion, three hundred forty-four billion, seven hundred eighty-one million, two hundred thirty-five thousand, seven hundred eighty-nine".