128169455 has 16 divisors (see below), whose sum is σ = 164229120. Its totient is φ = 95792928.

The previous prime is 128169451. The next prime is 128169491. The reversal of 128169455 is 554961821.

It is a cyclic number.

It is not a de Polignac number, because 128169455 - 2² = 128169451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128169451) 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 15 ways as a sum of consecutive naturals, for example, 8015 + ... + 17904.

It is an arithmetic number, because the mean of its divisors is an integer number (10264320).

Almost surely, 2^128169455 is an apocalyptic number.

128169455 is a deficient number, since it is larger than the sum of its proper divisors (36059665).

128169455 is a wasteful number, since it uses less digits than its factorization.

128169455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25990.

The product of its digits is 86400, while the sum is 41.

The square root of 128169455 is about 11321.1949457643. The cubic root of 128169455 is about 504.1907176408.

The spelling of 128169455 in words is "one hundred twenty-eight million, one hundred sixty-nine thousand, four hundred fifty-five".