12736317228 has 12 divisors (see below), whose sum is σ = 29718073560. Its totient is φ = 4245439072.

The previous prime is 12736317221. The next prime is 12736317259. The reversal of 12736317228 is 82271363721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 12736317228.

It is not an unprimeable number, because it can be changed into a prime (12736317221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530679873 + ... + 530679896.

It is an arithmetic number, because the mean of its divisors is an integer number (2476506130).

Almost surely, 2^12736317228 is an apocalyptic number.

It is an amenable number.

12736317228 is an abundant number, since it is smaller than the sum of its proper divisors (16981756332).

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

12736317228 is a wasteful number, since it uses less digits than its factorization.

12736317228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061359776 (or 1061359774 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The spelling of 12736317228 in words is "twelve billion, seven hundred thirty-six million, three hundred seventeen thousand, two hundred twenty-eight".