12489997752 has 96 divisors (see below), whose sum is σ = 34682384880. Its totient is φ = 4058449920.

The previous prime is 12489997747. The next prime is 12489997769. The reversal of 12489997752 is 25779998421.

12489997752 is a `hidden beast` number, since 12 + 489 + 9 + 97 + 7 + 52 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 12489997752.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1671208 + ... + 1678664.

Almost surely, 2^12489997752 is an apocalyptic number.

12489997752 is a gapful number since it is divisible by the number (12) 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 12489997752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17341192440).

12489997752 is an abundant number, since it is smaller than the sum of its proper divisors (22192387128).

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

12489997752 is a wasteful number, since it uses less digits than its factorization.

12489997752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8053 (or 8046 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The spelling of 12489997752 in words is "twelve billion, four hundred eighty-nine million, nine hundred ninety-seven thousand, seven hundred fifty-two".