12321478944016 has 120 divisors (see below), whose sum is σ = 26326153212800. Its totient is φ = 5582404396800.

The previous prime is 12321478944001. The next prime is 12321478944017. The reversal of 12321478944016 is 61044987412321.

It is not an unprimeable number, because it can be changed into a prime (12321478944017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 774002905 + ... + 774018823.

Almost surely, 2^{12321478944016} is an apocalyptic number.

12321478944016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12321478944016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13163076606400).

12321478944016 is an abundant number, since it is smaller than the sum of its proper divisors (14004674268784).

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

12321478944016 is a wasteful number, since it uses less digits than its factorization.

12321478944016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17229 (or 17212 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 12321478944016 in words is "twelve trillion, three hundred twenty-one billion, four hundred seventy-eight million, nine hundred forty-four thousand, sixteen".