135839875644 has 36 divisors (see below), whose sum is σ = 374588749080. Its totient is φ = 41163598560.

The previous prime is 135839875631. The next prime is 135839875649. The reversal of 135839875644 is 446578938531.

135839875644 is a `hidden beast` number, since 1 + 3 + 583 + 9 + 8 + 7 + 5 + 6 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135839875649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171514599 + ... + 171515390.

It is an arithmetic number, because the mean of its divisors is an integer number (10405243030).

Almost surely, 2^135839875644 is an apocalyptic number.

It is an amenable number.

135839875644 is an abundant number, since it is smaller than the sum of its proper divisors (238748873436).

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

135839875644 is a wasteful number, since it uses less digits than its factorization.

135839875644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343030010 (or 343030005 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 63.

The spelling of 135839875644 in words is "one hundred thirty-five billion, eight hundred thirty-nine million, eight hundred seventy-five thousand, six hundred forty-four".