135638434793 has 2 divisors, whose sum is σ = 135638434794. Its totient is φ = 135638434792.

The previous prime is 135638434781. The next prime is 135638434843. The reversal of 135638434793 is 397434836531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110385411049 + 25253023744 = 332243^2 + 158912^2 .

It is a cyclic number.

It is not a de Polignac number, because 135638434793 - 2⁴ = 135638434777 is a prime.

It is not a weakly prime, because it can be changed into another prime (135638434693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67819217396 + 67819217397.

It is an arithmetic number, because the mean of its divisors is an integer number (67819217397).

Almost surely, 2^135638434793 is an apocalyptic number.

It is an amenable number.

135638434793 is a deficient number, since it is larger than the sum of its proper divisors (1).

135638434793 is an equidigital number, since it uses as much as digits as its factorization.

135638434793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 56.

The spelling of 135638434793 in words is "one hundred thirty-five billion, six hundred thirty-eight million, four hundred thirty-four thousand, seven hundred ninety-three".