1311046016569 has 2 divisors, whose sum is σ = 1311046016570. Its totient is φ = 1311046016568.

The previous prime is 1311046016519. The next prime is 1311046016639. The reversal of 1311046016569 is 9656106401131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1231682675344 + 79363341225 = 1109812^2 + 281715^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311046016569 - 2²⁹ = 1310509145657 is a prime.

It is a super-2 number, since 2×1311046016569² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1311046016519) 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, 655523008284 + 655523008285.

It is an arithmetic number, because the mean of its divisors is an integer number (655523008285).

Almost surely, 2^{1311046016569} is an apocalyptic number.

It is an amenable number.

1311046016569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311046016569 is an equidigital number, since it uses as much as digits as its factorization.

1311046016569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 1311046016569 in words is "one trillion, three hundred eleven billion, forty-six million, sixteen thousand, five hundred sixty-nine".