12992128725 has 24 divisors (see below), whose sum is σ = 21483803520. Its totient is φ = 6928011520.

The previous prime is 12992128711. The next prime is 12992128729. The reversal of 12992128725 is 52782129921.

It is not a de Polignac number, because 12992128725 - 2⁸ = 12992128469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12992128729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 675796 + ... + 694754.

It is an arithmetic number, because the mean of its divisors is an integer number (895158480).

Almost surely, 2^12992128725 is an apocalyptic number.

12992128725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12992128725 is a deficient number, since it is larger than the sum of its proper divisors (8491674795).

12992128725 is a wasteful number, since it uses less digits than its factorization.

12992128725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28109 (or 28104 counting only the distinct ones).

The product of its digits is 362880, while the sum is 48.

The spelling of 12992128725 in words is "twelve billion, nine hundred ninety-two million, one hundred twenty-eight thousand, seven hundred twenty-five".