12168477791 has 2 divisors, whose sum is σ = 12168477792. Its totient is φ = 12168477790.

The previous prime is 12168477767. The next prime is 12168477829. The reversal of 12168477791 is 19777486121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12168477791 - 2²² = 12164283487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12168477491) 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 as a sum of consecutive naturals, namely, 6084238895 + 6084238896.

It is an arithmetic number, because the mean of its divisors is an integer number (6084238896).

Almost surely, 2^12168477791 is an apocalyptic number.

12168477791 is a deficient number, since it is larger than the sum of its proper divisors (1).

12168477791 is an equidigital number, since it uses as much as digits as its factorization.

12168477791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 53.

The spelling of 12168477791 in words is "twelve billion, one hundred sixty-eight million, four hundred seventy-seven thousand, seven hundred ninety-one".