12509785208 has 16 divisors (see below), whose sum is σ = 23466338280. Its totient is φ = 6252095008.

The previous prime is 12509785201. The next prime is 12509785217. The reversal of 12509785208 is 80258790521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12509785201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330635 + ... + 366522.

Almost surely, 2^12509785208 is an apocalyptic number.

It is an amenable number.

12509785208 is a deficient number, since it is larger than the sum of its proper divisors (10956553072).

12509785208 is a wasteful number, since it uses less digits than its factorization.

12509785208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699406 (or 699402 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 47.

The spelling of 12509785208 in words is "twelve billion, five hundred nine million, seven hundred eighty-five thousand, two hundred eight".