12168451947920 has 40 divisors (see below), whose sum is σ = 28449704727360. Its totient is φ = 4840188702080.

The previous prime is 12168451947893. The next prime is 12168451947937. The reversal of 12168451947920 is 2974915486121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 12168451947920.

It is an unprimeable number.

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, 424861796 + ... + 424890435.

It is an arithmetic number, because the mean of its divisors is an integer number (711242618184).

Almost surely, 2^{12168451947920} is an apocalyptic number.

12168451947920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12168451947920 is an abundant number, since it is smaller than the sum of its proper divisors (16281252779440).

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

12168451947920 is a wasteful number, since it uses less digits than its factorization.

12168451947920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849752423 (or 849752417 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 12168451947920 in words is "twelve trillion, one hundred sixty-eight billion, four hundred fifty-one million, nine hundred forty-seven thousand, nine hundred twenty".