12817555200564 has 48 divisors (see below), whose sum is σ = 29959869628416. Its totient is φ = 4265059788000.

The previous prime is 12817555200557. The next prime is 12817555200649. The reversal of 12817555200564 is 46500255571821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23379789 + ... + 23921739.

It is an arithmetic number, because the mean of its divisors is an integer number (624163950592).

Almost surely, 2^{12817555200564} is an apocalyptic number.

It is an amenable number.

12817555200564 is an abundant number, since it is smaller than the sum of its proper divisors (17142314427852).

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

12817555200564 is a wasteful number, since it uses less digits than its factorization.

12817555200564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545396 (or 545394 counting only the distinct ones).

The product of its (nonzero) digits is 3360000, while the sum is 51.

The spelling of 12817555200564 in words is "twelve trillion, eight hundred seventeen billion, five hundred fifty-five million, two hundred thousand, five hundred sixty-four".