135531382445181 has 16 divisors (see below), whose sum is σ = 200790901651200. Its totient is φ = 90352604183904.

The previous prime is 135531382445167. The next prime is 135531382445191. The reversal of 135531382445181 is 181544283135531.

135531382445181 is a `hidden beast` number, since 1 + 3 + 5 + 5 + 3 + 1 + 3 + 82 + 44 + 518 + 1 = 666.

It is not a de Polignac number, because 135531382445181 - 2⁶ = 135531382445117 is a prime.

It is a super-2 number, since 2×135531382445181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135531382445131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44348896 + ... + 47306313.

It is an arithmetic number, because the mean of its divisors is an integer number (12549431353200).

Almost surely, 2^{135531382445181} is an apocalyptic number.

It is an amenable number.

135531382445181 is a deficient number, since it is larger than the sum of its proper divisors (65259519206019).

135531382445181 is an equidigital number, since it uses as much as digits as its factorization.

135531382445181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91709985 (or 91709979 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The spelling of 135531382445181 in words is "one hundred thirty-five trillion, five hundred thirty-one billion, three hundred eighty-two million, four hundred forty-five thousand, one hundred eighty-one".