135991048688 has 20 divisors (see below), whose sum is σ = 287435626008. Its totient is φ = 61814112960.

The previous prime is 135991048673. The next prime is 135991048729. The reversal of 135991048688 is 886840199531.

It is a self number, because there is not a number n which added to its sum of digits gives 135991048688.

It is a congruent number.

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, 386338031 + ... + 386338382.

Almost surely, 2^135991048688 is an apocalyptic number.

It is an amenable number.

135991048688 is an abundant number, since it is smaller than the sum of its proper divisors (151444577320).

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

135991048688 is a wasteful number, since it uses less digits than its factorization.

135991048688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772676432 (or 772676426 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 62.

The spelling of 135991048688 in words is "one hundred thirty-five billion, nine hundred ninety-one million, forty-eight thousand, six hundred eighty-eight".