128228988099 has 48 divisors (see below), whose sum is σ = 179135367936. Its totient is φ = 81566352000.

The previous prime is 128228988091. The next prime is 128228988197. The reversal of 128228988099 is 990889822821.

It is not a de Polignac number, because 128228988099 - 2³ = 128228988091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128228988091) 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 47 ways as a sum of consecutive naturals, for example, 122006124 + ... + 122007174.

It is an arithmetic number, because the mean of its divisors is an integer number (3731986832).

Almost surely, 2^128228988099 is an apocalyptic number.

128228988099 is a deficient number, since it is larger than the sum of its proper divisors (50906379837).

128228988099 is a wasteful number, since it uses less digits than its factorization.

128228988099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676 (or 1639 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 66.

The spelling of 128228988099 in words is "one hundred twenty-eight billion, two hundred twenty-eight million, nine hundred eighty-eight thousand, ninety-nine".