12566505112464 has 40 divisors (see below), whose sum is σ = 32480548826112. Its totient is φ = 4186631516800.

The previous prime is 12566505112457. The next prime is 12566505112531. The reversal of 12566505112464 is 46421150566521.

It is a happy number.

12566505112464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68767824 + ... + 68950319.

Almost surely, 2^{12566505112464} is an apocalyptic number.

It is an amenable number.

12566505112464 is an abundant number, since it is smaller than the sum of its proper divisors (19914043713648).

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

12566505112464 is a wasteful number, since it uses less digits than its factorization.

12566505112464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137720055 (or 137720049 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 48.

Adding to 12566505112464 its reverse (46421150566521), we get a palindrome (58987655678985).

The spelling of 12566505112464 in words is "twelve trillion, five hundred sixty-six billion, five hundred five million, one hundred twelve thousand, four hundred sixty-four".