1311366670573 has 2 divisors, whose sum is σ = 1311366670574. Its totient is φ = 1311366670572.

The previous prime is 1311366670571. The next prime is 1311366670661. The reversal of 1311366670573 is 3750766631131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1308273864804 + 3092805769 = 1143798^2 + 55613^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311366670573 - 2¹ = 1311366670571 is a prime.

Together with 1311366670571, 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 (1311366670571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655683335286 + 655683335287.

It is an arithmetic number, because the mean of its divisors is an integer number (655683335287).

Almost surely, 2^{1311366670573} is an apocalyptic number.

It is an amenable number.

1311366670573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311366670573 is an equidigital number, since it uses as much as digits as its factorization.

1311366670573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1428840, while the sum is 49.

The spelling of 1311366670573 in words is "one trillion, three hundred eleven billion, three hundred sixty-six million, six hundred seventy thousand, five hundred seventy-three".