12172617432025 has 72 divisors (see below), whose sum is σ = 16245040197312. Its totient is φ = 9024428160000.

The previous prime is 12172617432013. The next prime is 12172617432029. The reversal of 12172617432025 is 52023471627121.

It is a happy number.

It is not a de Polignac number, because 12172617432025 - 2¹⁷ = 12172617300953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12172617432029) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1235668350 + ... + 1235678200.

It is an arithmetic number, because the mean of its divisors is an integer number (225625558296).

Almost surely, 2^{12172617432025} is an apocalyptic number.

It is an amenable number.

12172617432025 is a deficient number, since it is larger than the sum of its proper divisors (4072422765287).

12172617432025 is an equidigital number, since it uses as much as digits as its factorization.

12172617432025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10403 (or 10157 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 12172617432025 in words is "twelve trillion, one hundred seventy-two billion, six hundred seventeen million, four hundred thirty-two thousand, twenty-five".