128558855 has 8 divisors (see below), whose sum is σ = 154340592. Its totient is φ = 102800448.

The previous prime is 128558819. The next prime is 128558869. The reversal of 128558855 is 558855821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128558855 - 2⁶ = 128558791 is a prime.

It is a super-2 number, since 2×128558855² = 33054758397822050, which contains 22 as substring.

It is a Duffinian number.

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, 10412 + ... + 19118.

It is an arithmetic number, because the mean of its divisors is an integer number (19292574).

Almost surely, 2^128558855 is an apocalyptic number.

128558855 is a deficient number, since it is larger than the sum of its proper divisors (25781737).

128558855 is an equidigital number, since it uses as much as digits as its factorization.

128558855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11665.

The product of its digits is 640000, while the sum is 47.

The square root of 128558855 is about 11338.3797343359. The cubic root of 128558855 is about 504.7008063376.

The spelling of 128558855 in words is "one hundred twenty-eight million, five hundred fifty-eight thousand, eight hundred fifty-five".