12529891969 has 9 divisors (see below), whose sum is σ = 14576500161. Its totient is φ = 10739235780.

The previous prime is 12529891937. The next prime is 12529891987. The reversal of 12529891969 is 96919892521.

The square root of 12529891969 is 111937.

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

It is not a de Polignac number, because 12529891969 - 2⁵ = 12529891937 is a prime.

It is a super-2 number, since 2×12529891969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12529891669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 775564 + ... + 791554.

It is an arithmetic number, because the mean of its divisors is an integer number (1619611129).

Almost surely, 2^12529891969 is an apocalyptic number.

12529891969 is the 111937-th square number.

12529891969 is the 55969-th centered octagonal number.

It is an amenable number.

12529891969 is a deficient number, since it is larger than the sum of its proper divisors (2046608192).

12529891969 is an frugal number, since it uses more digits than its factorization.

12529891969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31996 (or 15998 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 61.

The spelling of 12529891969 in words is "twelve billion, five hundred twenty-nine million, eight hundred ninety-one thousand, nine hundred sixty-nine".