1291193598263 has 2 divisors, whose sum is σ = 1291193598264. Its totient is φ = 1291193598262.

The previous prime is 1291193598229. The next prime is 1291193598269. The reversal of 1291193598263 is 3628953911921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1291193598263 - 2⁸ = 1291193598007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1291193598269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645596799131 + 645596799132.

It is an arithmetic number, because the mean of its divisors is an integer number (645596799132).

Almost surely, 2^{1291193598263} is an apocalyptic number.

1291193598263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291193598263 is an equidigital number, since it uses as much as digits as its factorization.

1291193598263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 59.

The spelling of 1291193598263 in words is "one trillion, two hundred ninety-one billion, one hundred ninety-three million, five hundred ninety-eight thousand, two hundred sixty-three".