128550955 has 32 divisors (see below), whose sum is σ = 173150208. Its totient is φ = 90979200.

The previous prime is 128550907. The next prime is 128551001. The reversal of 128550955 is 559055821.

It is not a de Polignac number, because 128550955 - 2¹¹ = 128548907 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263722 + ... + 264208.

It is an arithmetic number, because the mean of its divisors is an integer number (5410944).

Almost surely, 2^128550955 is an apocalyptic number.

128550955 is a deficient number, since it is larger than the sum of its proper divisors (44599253).

128550955 is a wasteful number, since it uses less digits than its factorization.

128550955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667.

The product of its (nonzero) digits is 90000, while the sum is 40.

The square root of 128550955 is about 11338.0313546929. The cubic root of 128550955 is about 504.6904680946.

The spelling of 128550955 in words is "one hundred twenty-eight million, five hundred fifty thousand, nine hundred fifty-five".