128959061436 has 108 divisors (see below), whose sum is σ = 333509085000. Its totient is φ = 42014385216.

The previous prime is 128959061419. The next prime is 128959061449. The reversal of 128959061436 is 634160959821.

128959061436 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 590 + 6 + 1 + 43 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22428690 + ... + 22434438.

Almost surely, 2^128959061436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128959061436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166754542500).

128959061436 is an abundant number, since it is smaller than the sum of its proper divisors (204550023564).

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

128959061436 is a wasteful number, since it uses less digits than its factorization.

128959061436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6056 (or 5992 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 128959061436 in words is "one hundred twenty-eight billion, nine hundred fifty-nine million, sixty-one thousand, four hundred thirty-six".