128163775305 has 32 divisors (see below), whose sum is σ = 206427108096. Its totient is φ = 67900473344.

The previous prime is 128163775301. The next prime is 128163775379. The reversal of 128163775305 is 503577361821.

It is a cyclic number.

It is not a de Polignac number, because 128163775305 - 2² = 128163775301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128163775301) 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 31 ways as a sum of consecutive naturals, for example, 1346569 + ... + 1438601.

It is an arithmetic number, because the mean of its divisors is an integer number (6450847128).

Almost surely, 2^128163775305 is an apocalyptic number.

128163775305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128163775305 is a deficient number, since it is larger than the sum of its proper divisors (78263332791).

128163775305 is a wasteful number, since it uses less digits than its factorization.

128163775305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92657.

The product of its (nonzero) digits is 1058400, while the sum is 48.

The spelling of 128163775305 in words is "one hundred twenty-eight billion, one hundred sixty-three million, seven hundred seventy-five thousand, three hundred five".