12564603441220 has 96 divisors (see below), whose sum is σ = 27915168153600. Its totient is φ = 4740723571584.

The previous prime is 12564603441211. The next prime is 12564603441277. The reversal of 12564603441220 is 2214430646521.

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, 29844141 + ... + 30262219.

It is an arithmetic number, because the mean of its divisors is an integer number (290783001600).

Almost surely, 2^{12564603441220} is an apocalyptic number.

12564603441220 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 12564603441220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13957584076800).

12564603441220 is an abundant number, since it is smaller than the sum of its proper divisors (15350564712380).

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

12564603441220 is a wasteful number, since it uses less digits than its factorization.

12564603441220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419017 (or 419015 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 12564603441220 in words is "twelve trillion, five hundred sixty-four billion, six hundred three million, four hundred forty-one thousand, two hundred twenty".