135185505581532 has 24 divisors (see below), whose sum is σ = 360494681550976. Its totient is φ = 38624430166128.

The previous prime is 135185505581531. The next prime is 135185505581537. The reversal of 135185505581532 is 235185505581531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135185505581531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804675628378 + ... + 804675628545.

Almost surely, 2^{135185505581532} is an apocalyptic number.

135185505581532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135185505581532 is an abundant number, since it is smaller than the sum of its proper divisors (225309175969444).

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

135185505581532 is a wasteful number, since it uses less digits than its factorization.

135185505581532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609351256937 (or 1609351256935 counting only the distinct ones).

The product of its (nonzero) digits is 18000000, while the sum is 57.

Subtracting 135185505581532 from its reverse (235185505581531), we obtain a palindrome (99999999999999).

The spelling of 135185505581532 in words is "one hundred thirty-five trillion, one hundred eighty-five billion, five hundred five million, five hundred eighty-one thousand, five hundred thirty-two".