12544311822025 has 9 divisors (see below), whose sum is σ = 15554968618471. Its totient is φ = 10035435290440.

The previous prime is 12544311822017. The next prime is 12544311822043. The reversal of 12544311822025 is 52022811344521.

The square root of 12544311822025 is 3541795.

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

It can be written as a sum of positive squares in only one way, i.e., 4515952255929 + 8028359566096 = 2125077^2 + 2833436^2 .

It is not a de Polignac number, because 12544311822025 - 2³ = 12544311822017 is a prime.

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, 17354796 + ... + 18063154.

Almost surely, 2^{12544311822025} is an apocalyptic number.

12544311822025 is the 3541795-th square number.

12544311822025 is the 1770898-th centered octagonal number.

It is an amenable number.

12544311822025 is a deficient number, since it is larger than the sum of its proper divisors (3010656796446).

12544311822025 is an frugal number, since it uses more digits than its factorization.

12544311822025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416728 (or 708364 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

It can be divided in two parts, 12544311 and 822025, that added together give a square (13366336 = 3656²).

The spelling of 12544311822025 in words is "twelve trillion, five hundred forty-four billion, three hundred eleven million, eight hundred twenty-two thousand, twenty-five".