1311423406529 has 2 divisors, whose sum is σ = 1311423406530. Its totient is φ = 1311423406528.

The previous prime is 1311423406523. The next prime is 1311423406589. The reversal of 1311423406529 is 9256043241131.

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., 1034482239025 + 276941167504 = 1017095^2 + 526252^2 .

It is an emirp because it is prime and its reverse (9256043241131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311423406529 - 2³⁶ = 1242703929793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311423406523) 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, 655711703264 + 655711703265.

It is an arithmetic number, because the mean of its divisors is an integer number (655711703265).

Almost surely, 2^{1311423406529} is an apocalyptic number.

It is an amenable number.

1311423406529 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311423406529 is an equidigital number, since it uses as much as digits as its factorization.

1311423406529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 1311423406529 in words is "one trillion, three hundred eleven billion, four hundred twenty-three million, four hundred six thousand, five hundred twenty-nine".