12171745677 has 32 divisors (see below), whose sum is σ = 20381804800. Its totient is φ = 6420254400.

The previous prime is 12171745661. The next prime is 12171745681. The reversal of 12171745677 is 77654717121.

It is a happy number.

It is not a de Polignac number, because 12171745677 - 2⁴ = 12171745661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12171745177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 441574 + ... + 468327.

It is an arithmetic number, because the mean of its divisors is an integer number (636931400).

Almost surely, 2^12171745677 is an apocalyptic number.

It is an amenable number.

12171745677 is a deficient number, since it is larger than the sum of its proper divisors (8210059123).

12171745677 is an equidigital number, since it uses as much as digits as its factorization.

12171745677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909938 (or 909924 counting only the distinct ones).

The product of its digits is 576240, while the sum is 48.

The spelling of 12171745677 in words is "twelve billion, one hundred seventy-one million, seven hundred forty-five thousand, six hundred seventy-seven".