128909063284 has 12 divisors (see below), whose sum is σ = 225601867008. Its totient is φ = 64451387000.

The previous prime is 128909063273. The next prime is 128909063291. The reversal of 128909063284 is 482360909821.

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, 692692 + ... + 858859.

It is an arithmetic number, because the mean of its divisors is an integer number (18800155584).

Almost surely, 2^128909063284 is an apocalyptic number.

It is an amenable number.

128909063284 is a deficient number, since it is larger than the sum of its proper divisors (96692803724).

128909063284 is a wasteful number, since it uses less digits than its factorization.

128909063284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572326 (or 1572324 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 128909063284 in words is "one hundred twenty-eight billion, nine hundred nine million, sixty-three thousand, two hundred eighty-four".