12169697856 has 56 divisors (see below), whose sum is σ = 32207204064. Its totient is φ = 4055531520.

The previous prime is 12169697801. The next prime is 12169697857. The reversal of 12169697856 is 65879696121.

12169697856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12169697856.

It is not an unprimeable number, because it can be changed into a prime (12169697857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1279936 + ... + 1289408.

It is an arithmetic number, because the mean of its divisors is an integer number (575128644).

Almost surely, 2^12169697856 is an apocalyptic number.

12169697856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12169697856 is an abundant number, since it is smaller than the sum of its proper divisors (20037506208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12169697856 is an equidigital number, since it uses as much as digits as its factorization.

12169697856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16179 (or 16169 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 60.

The spelling of 12169697856 in words is "twelve billion, one hundred sixty-nine million, six hundred ninety-seven thousand, eight hundred fifty-six".