12543337225 has 12 divisors (see below), whose sum is σ = 15555487644. Its totient is φ = 10033541120.

The previous prime is 12543337199. The next prime is 12543337237. The reversal of 12543337225 is 52273334521.

It can be written as a sum of positive squares in 6 ways, for example, as 977625289 + 11565711936 = 31267^2 + 107544^2 .

It is not a de Polignac number, because 12543337225 - 2²⁹ = 12006466313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 253737 + ... + 299113.

It is an arithmetic number, because the mean of its divisors is an integer number (1296290637).

Almost surely, 2^12543337225 is an apocalyptic number.

It is an amenable number.

12543337225 is a deficient number, since it is larger than the sum of its proper divisors (3012150419).

12543337225 is a wasteful number, since it uses less digits than its factorization.

12543337225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56444 (or 56439 counting only the distinct ones).

The product of its digits is 151200, while the sum is 37.

The spelling of 12543337225 in words is "twelve billion, five hundred forty-three million, three hundred thirty-seven thousand, two hundred twenty-five".