12561700230144 has 352 divisors, whose sum is σ = 42171966480000. Its totient is φ = 3661708197888.

The previous prime is 12561700230017. The next prime is 12561700230151. The reversal of 12561700230144 is 44103200716521.

12561700230144 is a `hidden beast` number, since 1 + 2 + 5 + 617 + 0 + 0 + 2 + 30 + 1 + 4 + 4 = 666.

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 = 12561700230099 and 12561700230108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5909332 + ... + 7748780.

Almost surely, 2^{12561700230144} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12561700230144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21085983240000).

12561700230144 is an abundant number, since it is smaller than the sum of its proper divisors (29610266249856).

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

12561700230144 is a wasteful number, since it uses less digits than its factorization.

12561700230144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839510 (or 1839486 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

Adding to 12561700230144 its reverse (44103200716521), we get a palindrome (56664900946665).

The spelling of 12561700230144 in words is "twelve trillion, five hundred sixty-one billion, seven hundred million, two hundred thirty thousand, one hundred forty-four".