12560280440 has 64 divisors (see below), whose sum is σ = 28636070400. Its totient is φ = 4957517952.

The previous prime is 12560280407. The next prime is 12560280449. The reversal of 12560280440 is 4408206521.

It is a junction number, because it is equal to n+sod(n) for n = 12560280397 and 12560280406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12560280449) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3527381 + ... + 3530939.

It is an arithmetic number, because the mean of its divisors is an integer number (447438600).

Almost surely, 2^12560280440 is an apocalyptic number.

12560280440 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 12560280440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14318035200).

12560280440 is an abundant number, since it is smaller than the sum of its proper divisors (16075789960).

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

12560280440 is a wasteful number, since it uses less digits than its factorization.

12560280440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4716 (or 4712 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 12560280440 its reverse (4408206521), we get a palindrome (16968486961).

The spelling of 12560280440 in words is "twelve billion, five hundred sixty million, two hundred eighty thousand, four hundred forty".