128117726880 has 192 divisors, whose sum is σ = 474125436288. Its totient is φ = 28669685760.

The previous prime is 128117726857. The next prime is 128117726881. The reversal of 128117726880 is 88627711821.

It is not an unprimeable number, because it can be changed into a prime (128117726881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 864619 + ... + 1001898.

It is an arithmetic number, because the mean of its divisors is an integer number (2469403314).

Almost surely, 2^128117726880 is an apocalyptic number.

128117726880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128117726880 is an abundant number, since it is smaller than the sum of its proper divisors (346007709408).

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

128117726880 is a wasteful number, since it uses less digits than its factorization.

128117726880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866559 (or 1866551 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 51.

The spelling of 128117726880 in words is "one hundred twenty-eight billion, one hundred seventeen million, seven hundred twenty-six thousand, eight hundred eighty".