12554530209 has 63 divisors (see below), whose sum is σ = 20869110613. Its totient is φ = 7271402112.

The previous prime is 12554530207. The next prime is 12554530253. The reversal of 12554530209 is 90203545521.

It is a happy number.

The square root of 12554530209 is 112047.

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

It can be written as a sum of positive squares in 10 ways, for example, as 5141320209 + 7413210000 = 71703^2 + 86100^2 .

It is not a de Polignac number, because 12554530209 - 2¹ = 12554530207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12554530207) 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 62 ways as a sum of consecutive naturals, for example, 738501769 + ... + 738501785.

Almost surely, 2^12554530209 is an apocalyptic number.

12554530209 is the 112047-th square number.

12554530209 is the 56024-th centered octagonal number.

It is an amenable number.

12554530209 is a deficient number, since it is larger than the sum of its proper divisors (8314580404).

12554530209 is an frugal number, since it uses more digits than its factorization.

12554530209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Multiplying 12554530209 by its sum of digits (36), we get a square (451963087524 = 672282²).

The spelling of 12554530209 in words is "twelve billion, five hundred fifty-four million, five hundred thirty thousand, two hundred nine".