12555222867 has 24 divisors (see below), whose sum is σ = 19790632368. Its totient is φ = 7606670400.

The previous prime is 12555222863. The next prime is 12555222877. The reversal of 12555222867 is 76822255521.

12555222867 is a `hidden beast` number, since 12 + 5 + 552 + 2 + 2 + 86 + 7 = 666.

It is not a de Polignac number, because 12555222867 - 2² = 12555222863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12555222863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 299193 + ... + 338565.

It is an arithmetic number, because the mean of its divisors is an integer number (824609682).

Almost surely, 2^12555222867 is an apocalyptic number.

12555222867 is a deficient number, since it is larger than the sum of its proper divisors (7235409501).

12555222867 is a wasteful number, since it uses less digits than its factorization.

12555222867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42611 (or 42608 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The spelling of 12555222867 in words is "twelve billion, five hundred fifty-five million, two hundred twenty-two thousand, eight hundred sixty-seven".