12817308056 has 32 divisors (see below), whose sum is σ = 27580608000. Its totient is φ = 5470142496.

The previous prime is 12817308001. The next prime is 12817308071. The reversal of 12817308056 is 65080371821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465446 + ... + 492213.

It is an arithmetic number, because the mean of its divisors is an integer number (861894000).

Almost surely, 2^12817308056 is an apocalyptic number.

It is an amenable number.

12817308056 is an abundant number, since it is smaller than the sum of its proper divisors (14763299944).

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

12817308056 is a wasteful number, since it uses less digits than its factorization.

12817308056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957911 (or 957907 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

Adding to 12817308056 its reverse (65080371821), we get a palindrome (77897679877).

The spelling of 12817308056 in words is "twelve billion, eight hundred seventeen million, three hundred eight thousand, fifty-six".