128435434227 has 12 divisors (see below), whose sum is σ = 187251662520. Its totient is φ = 84823401408.

The previous prime is 128435434111. The next prime is 128435434241. The reversal of 128435434227 is 722434534821.

128435434227 is a `hidden beast` number, since 1 + 2 + 8 + 43 + 543 + 42 + 27 = 666.

It is not a de Polignac number, because 128435434227 - 2²⁴ = 128418657011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128435434277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66684102 + ... + 66686027.

It is an arithmetic number, because the mean of its divisors is an integer number (15604305210).

Almost surely, 2^128435434227 is an apocalyptic number.

128435434227 is a deficient number, since it is larger than the sum of its proper divisors (58816228293).

128435434227 is a wasteful number, since it uses less digits than its factorization.

128435434227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133370242 (or 133370239 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 45.

The spelling of 128435434227 in words is "one hundred twenty-eight billion, four hundred thirty-five million, four hundred thirty-four thousand, two hundred twenty-seven".