12168946729 has 2 divisors, whose sum is σ = 12168946730. Its totient is φ = 12168946728.

The previous prime is 12168946709. The next prime is 12168946753. The reversal of 12168946729 is 92764986121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11291187600 + 877759129 = 106260^2 + 29627^2 .

It is a cyclic number.

It is not a de Polignac number, because 12168946729 - 2⁹ = 12168946217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12168946729.

It is not a weakly prime, because it can be changed into another prime (12168946709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6084473364 + 6084473365.

It is an arithmetic number, because the mean of its divisors is an integer number (6084473365).

Almost surely, 2^12168946729 is an apocalyptic number.

It is an amenable number.

12168946729 is a deficient number, since it is larger than the sum of its proper divisors (1).

12168946729 is an equidigital number, since it uses as much as digits as its factorization.

12168946729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 55.

The spelling of 12168946729 in words is "twelve billion, one hundred sixty-eight million, nine hundred forty-six thousand, seven hundred twenty-nine".