12498569209 has 9 divisors (see below), whose sum is σ = 14540062341. Its totient is φ = 10712388540.

The previous prime is 12498569207. The next prime is 12498569287. The reversal of 12498569209 is 90296589421.

The square root of 12498569209 is 111797.

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

It is not a de Polignac number, because 12498569209 - 2¹ = 12498569207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12498569209.

It is not an unprimeable number, because it can be changed into a prime (12498569207) 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, 774594 + ... + 790564.

Almost surely, 2^12498569209 is an apocalyptic number.

12498569209 is the 111797-th square number.

12498569209 is the 55899-th centered octagonal number.

It is an amenable number.

12498569209 is a deficient number, since it is larger than the sum of its proper divisors (2041493132).

12498569209 is an frugal number, since it uses more digits than its factorization.

12498569209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31956 (or 15978 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 12498569209 in words is "twelve billion, four hundred ninety-eight million, five hundred sixty-nine thousand, two hundred nine".