12566628198 has 20 divisors (see below), whose sum is σ = 28158556140. Its totient is φ = 4188876012.

The previous prime is 12566628167. The next prime is 12566628199. The reversal of 12566628198 is 89182666521.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566628199) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 38785728 + ... + 38786051.

It is an arithmetic number, because the mean of its divisors is an integer number (1407927807).

Almost surely, 2^12566628198 is an apocalyptic number.

12566628198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12566628198 is an abundant number, since it is smaller than the sum of its proper divisors (15591927942).

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

12566628198 is an equidigital number, since it uses as much as digits as its factorization.

12566628198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77571793 (or 77571784 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 12566628198 in words is "twelve billion, five hundred sixty-six million, six hundred twenty-eight thousand, one hundred ninety-eight".