135512354549981 has 2 divisors, whose sum is σ = 135512354549982. Its totient is φ = 135512354549980.

The previous prime is 135512354549969. The next prime is 135512354550011. The reversal of 135512354549981 is 189945453215531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131029115772025 + 4483238777956 = 11446795^2 + 2117366^2 .

It is a cyclic number.

It is not a de Polignac number, because 135512354549981 - 2⁶ = 135512354549917 is a prime.

It is a super-2 number, since 2×135512354549981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135512354549081) 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, 67756177274990 + 67756177274991.

It is an arithmetic number, because the mean of its divisors is an integer number (67756177274991).

Almost surely, 2^{135512354549981} is an apocalyptic number.

It is an amenable number.

135512354549981 is a deficient number, since it is larger than the sum of its proper divisors (1).

135512354549981 is an equidigital number, since it uses as much as digits as its factorization.

135512354549981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640000, while the sum is 65.

The spelling of 135512354549981 in words is "one hundred thirty-five trillion, five hundred twelve billion, three hundred fifty-four million, five hundred forty-nine thousand, nine hundred eighty-one".