128555582976 has 80 divisors (see below), whose sum is σ = 380533494000. Its totient is φ = 42851856384.

The previous prime is 128555582891. The next prime is 128555582993. The reversal of 128555582976 is 679285555821.

128555582976 is a `hidden beast` number, since 1 + 2 + 8 + 5 + 5 + 558 + 2 + 9 + 76 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4635901 + ... + 4663548.

It is an arithmetic number, because the mean of its divisors is an integer number (4756668675).

Almost surely, 2^128555582976 is an apocalyptic number.

128555582976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128555582976 is an abundant number, since it is smaller than the sum of its proper divisors (251977911024).

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

128555582976 is an frugal number, since it uses more digits than its factorization.

128555582976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9299476 (or 9299454 counting only the distinct ones).

The product of its digits is 60480000, while the sum is 63.

The spelling of 128555582976 in words is "one hundred twenty-eight billion, five hundred fifty-five million, five hundred eighty-two thousand, nine hundred seventy-six".