12128854555 has 16 divisors (see below), whose sum is σ = 15029768160. Its totient is φ = 9390463488.

The previous prime is 12128854531. The next prime is 12128854559. The reversal of 12128854555 is 55545882121.

It is a cyclic number.

It is not a de Polignac number, because 12128854555 - 2⁹ = 12128854043 is a prime.

It is a super-3 number, since 3×12128854555³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (12128854559) 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, 235342 + ... + 282211.

It is an arithmetic number, because the mean of its divisors is an integer number (939360510).

Almost surely, 2^12128854555 is an apocalyptic number.

12128854555 is a deficient number, since it is larger than the sum of its proper divisors (2900913605).

12128854555 is a wasteful number, since it uses less digits than its factorization.

12128854555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517710.

The product of its digits is 640000, while the sum is 46.

The spelling of 12128854555 in words is "twelve billion, one hundred twenty-eight million, eight hundred fifty-four thousand, five hundred fifty-five".