12280558556 has 144 divisors (see below), whose sum is σ = 26527435200. Its totient is φ = 4953940992.

The previous prime is 12280558531. The next prime is 12280558559. The reversal of 12280558556 is 65585508221.

It is a self number, because there is not a number n which added to its sum of digits gives 12280558556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12280558559) 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 47 ways as a sum of consecutive naturals, for example, 34207505 + ... + 34207863.

It is an arithmetic number, because the mean of its divisors is an integer number (184218300).

Almost surely, 2^12280558556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12280558556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13263717600).

12280558556 is an abundant number, since it is smaller than the sum of its proper divisors (14246876644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12280558556 is a wasteful number, since it uses less digits than its factorization.

12280558556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 47.

The spelling of 12280558556 in words is "twelve billion, two hundred eighty million, five hundred fifty-eight thousand, five hundred fifty-six".