12521578560 has 112 divisors (see below), whose sum is σ = 40023288000. Its totient is φ = 3316639744.

The previous prime is 12521578549. The next prime is 12521578571. The reversal of 12521578560 is 6587512521.

It is an interprime number because it is at equal distance from previous prime (12521578549) and next prime (12521578571).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99271 + ... + 186809.

Almost surely, 2^12521578560 is an apocalyptic number.

12521578560 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 12521578560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20011644000).

12521578560 is an abundant number, since it is smaller than the sum of its proper divisors (27501709440).

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

12521578560 is a wasteful number, since it uses less digits than its factorization.

12521578560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87708 (or 87698 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 42.

The spelling of 12521578560 in words is "twelve billion, five hundred twenty-one million, five hundred seventy-eight thousand, five hundred sixty".