12545566416 has 50 divisors (see below), whose sum is σ = 36310512722. Its totient is φ = 4181855040.

The previous prime is 12545566399. The next prime is 12545566427. The reversal of 12545566416 is 61466554521.

12545566416 is a `hidden beast` number, since 1 + 2 + 5 + 45 + 566 + 41 + 6 = 666.

12545566416 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7433888400 + 5111678016 = 86220^2 + 71496^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4838815 + ... + 4841406.

Almost surely, 2^12545566416 is an apocalyptic number.

12545566416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12545566416 is an abundant number, since it is smaller than the sum of its proper divisors (23764946306).

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

12545566416 is an equidigital number, since it uses as much as digits as its factorization.

12545566416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9680241 (or 9680226 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The spelling of 12545566416 in words is "twelve billion, five hundred forty-five million, five hundred sixty-six thousand, four hundred sixteen".