135881237632 has 32 divisors (see below), whose sum is σ = 309372462720. Its totient is φ = 58234815744.

The previous prime is 135881237629. The next prime is 135881237699. The reversal of 135881237632 is 236732188531.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75825688 + ... + 75827479.

It is an arithmetic number, because the mean of its divisors is an integer number (9667889460).

Almost surely, 2^135881237632 is an apocalyptic number.

It is an amenable number.

135881237632 is an abundant number, since it is smaller than the sum of its proper divisors (173491225088).

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

135881237632 is an equidigital number, since it uses as much as digits as its factorization.

135881237632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151653188 (or 151653176 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The spelling of 135881237632 in words is "one hundred thirty-five billion, eight hundred eighty-one million, two hundred thirty-seven thousand, six hundred thirty-two".