12566170945 has 16 divisors (see below), whose sum is σ = 15558428160. Its totient is φ = 9738391104.

The previous prime is 12566170937. The next prime is 12566170949. The reversal of 12566170945 is 54907166521.

It is a cyclic number.

It is not a de Polignac number, because 12566170945 - 2³ = 12566170937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12566170895 and 12566170904.

It is not an unprimeable number, because it can be changed into a prime (12566170949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279189 + ... + 321058.

It is an arithmetic number, because the mean of its divisors is an integer number (972401760).

Almost surely, 2^12566170945 is an apocalyptic number.

It is an amenable number.

12566170945 is a deficient number, since it is larger than the sum of its proper divisors (2992257215).

12566170945 is an equidigital number, since it uses as much as digits as its factorization.

12566170945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600384.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 12566170945 in words is "twelve billion, five hundred sixty-six million, one hundred seventy thousand, nine hundred forty-five".