12169356729 has 4 divisors (see below), whose sum is σ = 16225808976. Its totient is φ = 8112904484.

The previous prime is 12169356709. The next prime is 12169356763. The reversal of 12169356729 is 92765396121.

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.

It is a cyclic number.

It is not a de Polignac number, because 12169356729 - 2⁷ = 12169356601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12169356709) 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 3 ways as a sum of consecutive naturals, for example, 2028226119 + ... + 2028226124.

It is an arithmetic number, because the mean of its divisors is an integer number (4056452244).

Almost surely, 2^12169356729 is an apocalyptic number.

It is an amenable number.

12169356729 is a deficient number, since it is larger than the sum of its proper divisors (4056452247).

12169356729 is an equidigital number, since it uses as much as digits as its factorization.

12169356729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056452246.

The product of its digits is 1224720, while the sum is 51.

The spelling of 12169356729 in words is "twelve billion, one hundred sixty-nine million, three hundred fifty-six thousand, seven hundred twenty-nine".