128188721088 has 168 divisors, whose sum is σ = 384386559648. Its totient is φ = 40767141888.

The previous prime is 128188721077. The next prime is 128188721123. The reversal of 128188721088 is 880127881821.

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, 5247270 + ... + 5271642.

It is an arithmetic number, because the mean of its divisors is an integer number (2288015236).

Almost surely, 2^128188721088 is an apocalyptic number.

128188721088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128188721088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192193279824).

128188721088 is an abundant number, since it is smaller than the sum of its proper divisors (256197838560).

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

128188721088 is a wasteful number, since it uses less digits than its factorization.

128188721088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24811 (or 24798 counting only the distinct ones).

The product of its (nonzero) digits is 917504, while the sum is 54.

The spelling of 128188721088 in words is "one hundred twenty-eight billion, one hundred eighty-eight million, seven hundred twenty-one thousand, eighty-eight".