128673755 has 12 divisors (see below), whose sum is σ = 179618400. Its totient is φ = 88233264.

The previous prime is 128673751. The next prime is 128673773. The reversal of 128673755 is 557376821.

It is a happy number.

It is not a de Polignac number, because 128673755 - 2² = 128673751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128673751) 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 11 ways as a sum of consecutive naturals, for example, 262355 + ... + 262844.

It is an arithmetic number, because the mean of its divisors is an integer number (14968200).

Almost surely, 2^128673755 is an apocalyptic number.

128673755 is a deficient number, since it is larger than the sum of its proper divisors (50944645).

128673755 is an equidigital number, since it uses as much as digits as its factorization.

128673755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525218 (or 525211 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The square root of 128673755 is about 11343.4454642318. The cubic root of 128673755 is about 504.8511210318.

The spelling of 128673755 in words is "one hundred twenty-eight million, six hundred seventy-three thousand, seven hundred fifty-five".