12897665534224 has 45 divisors (see below), whose sum is σ = 25223651466447. Its totient is φ = 6388893436032.

The previous prime is 12897665534207. The next prime is 12897665534267. The reversal of 12897665534224 is 42243556679821.

The square root of 12897665534224 is 3591332.

It is a perfect power (a square), and thus also a powerful number.

12897665534224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1413483210000 + 11484182324224 = 1188900^2 + 3388832^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1565816634 + ... + 1565824870.

Almost surely, 2^{12897665534224} is an apocalyptic number.

12897665534224 is the 3591332-nd square number.

It is an amenable number.

12897665534224 is a deficient number, since it is larger than the sum of its proper divisors (12325985932223).

12897665534224 is an frugal number, since it uses more digits than its factorization.

12897665534224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16700 (or 8348 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 64.

Multiplying 12897665534224 by its sum of digits (64), we get a square (825450594190336 = 28730656²).

The spelling of 12897665534224 in words is "twelve trillion, eight hundred ninety-seven billion, six hundred sixty-five million, five hundred thirty-four thousand, two hundred twenty-four".