1280323775069 has 2 divisors, whose sum is σ = 1280323775070. Its totient is φ = 1280323775068.

The previous prime is 1280323775057. The next prime is 1280323775089. The reversal of 1280323775069 is 9605773230821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 846055954969 + 434267820100 = 919813^2 + 658990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1280323775069 is a prime.

It is a super-2 number, since 2×1280323775069² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1280323775069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280323775089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640161887534 + 640161887535.

It is an arithmetic number, because the mean of its divisors is an integer number (640161887535).

Almost surely, 2^{1280323775069} is an apocalyptic number.

It is an amenable number.

1280323775069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280323775069 is an equidigital number, since it uses as much as digits as its factorization.

1280323775069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 1280323775069 in words is "one trillion, two hundred eighty billion, three hundred twenty-three million, seven hundred seventy-five thousand, sixty-nine".