12528506230969 has 9 divisors (see below), whose sum is σ = 12707704290319. Its totient is φ = 12351800627320.

The previous prime is 12528506230951. The next prime is 12528506230997. The reversal of 12528506230969 is 96903260582521.

The square root of 12528506230969 is 3539563.

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., 2033575821225 + 10494930409744 = 1426035^2 + 3239588^2 .

It is not a de Polignac number, because 12528506230969 - 2¹⁹ = 12528505706681 is a prime.

It is a super-2 number, since 2×12528506230969² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12528506230939) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 251284047 + ... + 251333899.

Almost surely, 2^{12528506230969} is an apocalyptic number.

12528506230969 is the 3539563-rd square number.

12528506230969 is the 1769782-nd centered octagonal number.

It is an amenable number.

12528506230969 is a deficient number, since it is larger than the sum of its proper divisors (179198059350).

12528506230969 is an frugal number, since it uses more digits than its factorization.

12528506230969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99848 (or 49924 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 58.

The spelling of 12528506230969 in words is "twelve trillion, five hundred twenty-eight billion, five hundred six million, two hundred thirty thousand, nine hundred sixty-nine".