12544799616 has 128 divisors (see below), whose sum is σ = 37146074400. Its totient is φ = 4167880704.

The previous prime is 12544799611. The next prime is 12544799651. The reversal of 12544799616 is 61699744521.

12544799616 is a `hidden beast` number, since 1 + 2 + 544 + 7 + 9 + 96 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12544799611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1075930 + ... + 1087526.

Almost surely, 2^12544799616 is an apocalyptic number.

12544799616 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 12544799616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18573037200).

12544799616 is an abundant number, since it is smaller than the sum of its proper divisors (24601274784).

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

12544799616 is a wasteful number, since it uses less digits than its factorization.

12544799616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11933 (or 11915 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 12544799616 in words is "twelve billion, five hundred forty-four million, seven hundred ninety-nine thousand, six hundred sixteen".