12661163126425 has 12 divisors (see below), whose sum is σ = 17127100665936. Its totient is φ = 9208118637200.

The previous prime is 12661163126419. The next prime is 12661163126441. The reversal of 12661163126425 is 52462136116621.

It is not a de Polignac number, because 12661163126425 - 2⁵ = 12661163126393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23020296319 + ... + 23020296868.

It is an arithmetic number, because the mean of its divisors is an integer number (1427258388828).

Almost surely, 2^{12661163126425} is an apocalyptic number.

It is an amenable number.

12661163126425 is a deficient number, since it is larger than the sum of its proper divisors (4465937539511).

12661163126425 is a wasteful number, since it uses less digits than its factorization.

12661163126425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46040593208 (or 46040593203 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The spelling of 12661163126425 in words is "twelve trillion, six hundred sixty-one billion, one hundred sixty-three million, one hundred twenty-six thousand, four hundred twenty-five".