12491001600 has 1296 divisors, whose sum is σ = 56169904896. Its totient is φ = 2408448000.

The previous prime is 12491001599. The next prime is 12491001703. The reversal of 12491001600 is 610019421.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 175929565 + ... + 175929635.

It is an arithmetic number, because the mean of its divisors is an integer number (43340976).

Almost surely, 2^12491001600 is an apocalyptic number.

12491001600 is a gapful number since it is divisible by the number (10) 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 12491001600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28084952448).

12491001600 is an abundant number, since it is smaller than the sum of its proper divisors (43678903296).

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

12491001600 is a wasteful number, since it uses less digits than its factorization.

12491001600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The spelling of 12491001600 in words is "twelve billion, four hundred ninety-one million, one thousand, six hundred".