135967020843481 has 2 divisors, whose sum is σ = 135967020843482. Its totient is φ = 135967020843480.

The previous prime is 135967020843449. The next prime is 135967020843503. The reversal of 135967020843481 is 184348020769531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107620809662025 + 28346211181456 = 10374045^2 + 5324116^2 .

It is an emirp because it is prime and its reverse (184348020769531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135967020843481 - 2⁵ = 135967020843449 is a prime.

It is a super-2 number, since 2×135967020843481² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135967020843431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67983510421740 + 67983510421741.

It is an arithmetic number, because the mean of its divisors is an integer number (67983510421741).

It is a 1-persistent number, because it is pandigital, but 2⋅135967020843481 = 271934041686962 is not.

Almost surely, 2^{135967020843481} is an apocalyptic number.

It is an amenable number.

135967020843481 is a deficient number, since it is larger than the sum of its proper divisors (1).

135967020843481 is an equidigital number, since it uses as much as digits as its factorization.

135967020843481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34836480, while the sum is 61.

The spelling of 135967020843481 in words is "one hundred thirty-five trillion, nine hundred sixty-seven billion, twenty million, eight hundred forty-three thousand, four hundred eighty-one".