135243136133523 has 24 divisors (see below), whose sum is σ = 213205408004160. Its totient is φ = 81928994099760.

The previous prime is 135243136133503. The next prime is 135243136133561. The reversal of 135243136133523 is 325331631342531.

It is a happy number.

135243136133523 is a `hidden beast` number, since 1 + 3 + 5 + 2 + 4 + 3 + 1 + 3 + 613 + 3 + 5 + 23 = 666.

135243136133523 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135243136133523 - 2⁶ = 135243136133459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135243136133503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304301413 + ... + 304745526.

It is an arithmetic number, because the mean of its divisors is an integer number (8883558666840).

Almost surely, 2^{135243136133523} is an apocalyptic number.

135243136133523 is a deficient number, since it is larger than the sum of its proper divisors (77962271870637).

135243136133523 is a wasteful number, since it uses less digits than its factorization.

135243136133523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609049199 (or 609049196 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 45.

The spelling of 135243136133523 in words is "one hundred thirty-five trillion, two hundred forty-three billion, one hundred thirty-six million, one hundred thirty-three thousand, five hundred twenty-three".