12564441403266 has 32 divisors (see below), whose sum is σ = 25141821465600. Its totient is φ = 4185991174400.

The previous prime is 12564441403231. The next prime is 12564441403271. The reversal of 12564441403266 is 66230414446521.

It is a super-2 number, since 2×12564441403266² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112863880 + ... + 112975148.

It is an arithmetic number, because the mean of its divisors is an integer number (785681920800).

Almost surely, 2^{12564441403266} is an apocalyptic number.

12564441403266 is an abundant number, since it is smaller than the sum of its proper divisors (12577380062334).

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

12564441403266 is a wasteful number, since it uses less digits than its factorization.

12564441403266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120794.

The product of its (nonzero) digits is 3317760, while the sum is 48.

Adding to 12564441403266 its reverse (66230414446521), we get a palindrome (78794855849787).

The spelling of 12564441403266 in words is "twelve trillion, five hundred sixty-four billion, four hundred forty-one million, four hundred three thousand, two hundred sixty-six".