12549152529 has 33 divisors (see below), whose sum is σ = 18864543259. Its totient is φ = 8347953960.

The previous prime is 12549152503. The next prime is 12549152533. The reversal of 12549152529 is 92525194521.

The square root of 12549152529 is 112023.

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

12549152529 is a `hidden beast` number, since 1 + 2 + 549 + 1 + 52 + 52 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4022476929 + 8526675600 = 63423^2 + 92340^2 .

It is not a de Polignac number, because 12549152529 - 2⁷ = 12549152401 is a prime.

It is a super-2 number, since 2×12549152529² (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 (12549152029) by changing a digit.

It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 27221359 + ... + 27221819.

Almost surely, 2^12549152529 is an apocalyptic number.

12549152529 is the 112023-rd square number.

12549152529 is the 56012-nd centered octagonal number.

It is an amenable number.

12549152529 is a deficient number, since it is larger than the sum of its proper divisors (6315390730).

12549152529 is an frugal number, since it uses more digits than its factorization.

12549152529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 464 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The spelling of 12549152529 in words is "twelve billion, five hundred forty-nine million, one hundred fifty-two thousand, five hundred twenty-nine".