128028636756 has 72 divisors (see below), whose sum is σ = 335169080064. Its totient is φ = 41179884480.

The previous prime is 128028636739. The next prime is 128028636763. The reversal of 128028636756 is 657636820821.

128028636756 is a `hidden beast` number, since 1 + 280 + 286 + 36 + 7 + 56 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 412735 + ... + 652998.

It is an arithmetic number, because the mean of its divisors is an integer number (4655126112).

Almost surely, 2^128028636756 is an apocalyptic number.

It is an amenable number.

128028636756 is an abundant number, since it is smaller than the sum of its proper divisors (207140443308).

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

128028636756 is a wasteful number, since it uses less digits than its factorization.

128028636756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065861 (or 1065856 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 128028636756 in words is "one hundred twenty-eight billion, twenty-eight million, six hundred thirty-six thousand, seven hundred fifty-six".