12168686977 has 4 divisors (see below), whose sum is σ = 12168935856. Its totient is φ = 12168438100.

The previous prime is 12168686939. The next prime is 12168686987. The reversal of 12168686977 is 77968686121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77968686121 = 19 ⋅4103615059.

It is a cyclic number.

It is not a de Polignac number, because 12168686977 - 2¹⁹ = 12168162689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12168686927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24163 + ... + 157864.

It is an arithmetic number, because the mean of its divisors is an integer number (3042233964).

Almost surely, 2^12168686977 is an apocalyptic number.

It is an amenable number.

12168686977 is a deficient number, since it is larger than the sum of its proper divisors (248879).

12168686977 is an equidigital number, since it uses as much as digits as its factorization.

12168686977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248878.

The product of its digits is 12192768, while the sum is 61.

The spelling of 12168686977 in words is "twelve billion, one hundred sixty-eight million, six hundred eighty-six thousand, nine hundred seventy-seven".