12515245344 has 144 divisors (see below), whose sum is σ = 40985904960. Its totient is φ = 3548413440.

The previous prime is 12515245313. The next prime is 12515245357. The reversal of 12515245344 is 44354251521.

12515245344 is a `hidden beast` number, since 12 + 5 + 152 + 453 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12515245299 and 12515245308.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240402 + ... + 287790.

It is an arithmetic number, because the mean of its divisors is an integer number (284624340).

Almost surely, 2^12515245344 is an apocalyptic number.

12515245344 is a gapful number since it is divisible by the number (14) 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 12515245344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20492952480).

12515245344 is an abundant number, since it is smaller than the sum of its proper divisors (28470659616).

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

12515245344 is a wasteful number, since it uses less digits than its factorization.

12515245344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47543 (or 47532 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

Adding to 12515245344 its reverse (44354251521), we get a palindrome (56869496865).

The spelling of 12515245344 in words is "twelve billion, five hundred fifteen million, two hundred forty-five thousand, three hundred forty-four".