12815008725 has 12 divisors (see below), whose sum is σ = 21187481216. Its totient is φ = 6834671280.

The previous prime is 12815008721. The next prime is 12815008727. The reversal of 12815008725 is 52780051821.

It is not a de Polignac number, because 12815008725 - 2² = 12815008721 is a prime.

It is a super-2 number, since 2×12815008725² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12815008721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85433317 + ... + 85433466.

Almost surely, 2^12815008725 is an apocalyptic number.

12815008725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12815008725 is a deficient number, since it is larger than the sum of its proper divisors (8372472491).

12815008725 is a wasteful number, since it uses less digits than its factorization.

12815008725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170866796 (or 170866791 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 39.

The spelling of 12815008725 in words is "twelve billion, eight hundred fifteen million, eight thousand, seven hundred twenty-five".