12780900209 has 32 divisors (see below), whose sum is σ = 16503201792. Its totient is φ = 9609768000.

The previous prime is 12780900161. The next prime is 12780900227. The reversal of 12780900209 is 90200908721.

It is not a de Polignac number, because 12780900209 - 2⁸ = 12780899953 is a prime.

It is a super-3 number, since 3×12780900209³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12780900289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232079 + ... + 281819.

It is an arithmetic number, because the mean of its divisors is an integer number (515725056).

Almost surely, 2^12780900209 is an apocalyptic number.

It is an amenable number.

12780900209 is a deficient number, since it is larger than the sum of its proper divisors (3722301583).

12780900209 is a wasteful number, since it uses less digits than its factorization.

12780900209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49877.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 12780900209 in words is "twelve billion, seven hundred eighty million, nine hundred thousand, two hundred nine".