12556266057 has 16 divisors (see below), whose sum is σ = 18605695680. Its totient is φ = 8369125056.

The previous prime is 12556266013. The next prime is 12556266103. The reversal of 12556266057 is 75066265521.

12556266057 is a `hidden beast` number, since 1 + 25 + 562 + 6 + 60 + 5 + 7 = 666.

12556266057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12556266057 - 2⁶ = 12556265993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12556266157) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 93793 + ... + 184145.

It is an arithmetic number, because the mean of its divisors is an integer number (1162855980).

Almost surely, 2^12556266057 is an apocalyptic number.

It is an amenable number.

12556266057 is a deficient number, since it is larger than the sum of its proper divisors (6049429623).

12556266057 is an equidigital number, since it uses as much as digits as its factorization.

12556266057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95509 (or 95503 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 12556266057 in words is "twelve billion, five hundred fifty-six million, two hundred sixty-six thousand, fifty-seven".