135531541788 has 12 divisors (see below), whose sum is σ = 316240264200. Its totient is φ = 45177180592.

The previous prime is 135531541781. The next prime is 135531541793. The reversal of 135531541788 is 887145135531.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 135531541788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135531541781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5647147563 + ... + 5647147586.

It is an arithmetic number, because the mean of its divisors is an integer number (26353355350).

Almost surely, 2^135531541788 is an apocalyptic number.

It is an amenable number.

135531541788 is an abundant number, since it is smaller than the sum of its proper divisors (180708722412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135531541788 is a wasteful number, since it uses less digits than its factorization.

135531541788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11294295156 (or 11294295154 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 51.

The spelling of 135531541788 in words is "one hundred thirty-five billion, five hundred thirty-one million, five hundred forty-one thousand, seven hundred eighty-eight".