12489321456 has 240 divisors, whose sum is σ = 37832453568. Its totient is φ = 3832012800.

The previous prime is 12489321419. The next prime is 12489321463. The reversal of 12489321456 is 65412398421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31459050 + ... + 31459446.

Almost surely, 2^12489321456 is an apocalyptic number.

12489321456 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 12489321456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18916226784).

12489321456 is an abundant number, since it is smaller than the sum of its proper divisors (25343132112).

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

12489321456 is a wasteful number, since it uses less digits than its factorization.

12489321456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 671 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The spelling of 12489321456 in words is "twelve billion, four hundred eighty-nine million, three hundred twenty-one thousand, four hundred fifty-six".