1281658271513 has 2 divisors, whose sum is σ = 1281658271514. Its totient is φ = 1281658271512.

The previous prime is 1281658271497. The next prime is 1281658271581. The reversal of 1281658271513 is 3151728561821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 750454898944 + 531203372569 = 866288^2 + 728837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1281658271513 - 2⁴ = 1281658271497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1281658271213) 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, 640829135756 + 640829135757.

It is an arithmetic number, because the mean of its divisors is an integer number (640829135757).

Almost surely, 2^{1281658271513} is an apocalyptic number.

It is an amenable number.

1281658271513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281658271513 is an equidigital number, since it uses as much as digits as its factorization.

1281658271513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 50.

The spelling of 1281658271513 in words is "one trillion, two hundred eighty-one billion, six hundred fifty-eight million, two hundred seventy-one thousand, five hundred thirteen".