135720138650771 has 2 divisors, whose sum is σ = 135720138650772. Its totient is φ = 135720138650770.

The previous prime is 135720138650731. The next prime is 135720138650779. The reversal of 135720138650771 is 177056831027531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135720138650771 is a prime.

It is not a weakly prime, because it can be changed into another prime (135720138650779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67860069325385 + 67860069325386.

It is an arithmetic number, because the mean of its divisors is an integer number (67860069325386).

Almost surely, 2^{135720138650771} is an apocalyptic number.

135720138650771 is a deficient number, since it is larger than the sum of its proper divisors (1).

135720138650771 is an equidigital number, since it uses as much as digits as its factorization.

135720138650771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7408800, while the sum is 56.

The spelling of 135720138650771 in words is "one hundred thirty-five trillion, seven hundred twenty billion, one hundred thirty-eight million, six hundred fifty thousand, seven hundred seventy-one".