12505830655 has 12 divisors (see below), whose sum is σ = 15073708680. Its totient is φ = 9960385904.

The previous prime is 12505830643. The next prime is 12505830671. The reversal of 12505830655 is 55603850521.

It is not a de Polignac number, because 12505830655 - 2⁷ = 12505830527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233376 + ... + 281914.

It is an arithmetic number, because the mean of its divisors is an integer number (1256142390).

Almost surely, 2^12505830655 is an apocalyptic number.

12505830655 is a deficient number, since it is larger than the sum of its proper divisors (2567878025).

12505830655 is an frugal number, since it uses more digits than its factorization.

12505830655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48998 (or 48771 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 12505830655 in words is "twelve billion, five hundred five million, eight hundred thirty thousand, six hundred fifty-five".