128775633 has 16 divisors (see below), whose sum is σ = 196494336. Its totient is φ = 73486800.

The previous prime is 128775623. The next prime is 128775653. The reversal of 128775633 is 336577821.

It is not a de Polignac number, because 128775633 - 2⁵ = 128775601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128775623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13558 + ... + 21008.

It is an arithmetic number, because the mean of its divisors is an integer number (12280896).

Almost surely, 2^128775633 is an apocalyptic number.

It is an amenable number.

128775633 is a deficient number, since it is larger than the sum of its proper divisors (67718703).

128775633 is an equidigital number, since it uses as much as digits as its factorization.

128775633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8284.

The product of its digits is 211680, while the sum is 42.

The square root of 128775633 is about 11347.9351866320. The cubic root of 128775633 is about 504.9843252332.

The spelling of 128775633 in words is "one hundred twenty-eight million, seven hundred seventy-five thousand, six hundred thirty-three".