128981000889 has 128 divisors (see below), whose sum is σ = 223082496000. Its totient is φ = 72960839424.

The previous prime is 128981000843. The next prime is 128981000903. The reversal of 128981000889 is 988000189821.

It is not a de Polignac number, because 128981000889 - 2⁷ = 128981000761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128981000839) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 177415044 + ... + 177415770.

It is an arithmetic number, because the mean of its divisors is an integer number (1742832000).

Almost surely, 2^128981000889 is an apocalyptic number.

128981000889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

128981000889 is a deficient number, since it is larger than the sum of its proper divisors (94101495111).

128981000889 is a wasteful number, since it uses less digits than its factorization.

128981000889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524 (or 1518 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 54.

The spelling of 128981000889 in words is "one hundred twenty-eight billion, nine hundred eighty-one million, eight hundred eighty-nine", and thus it is an aban number.