12556226605671 has 24 divisors (see below), whose sum is σ = 20739783346464. Its totient is φ = 7170817489920.

The previous prime is 12556226605669. The next prime is 12556226605711. The reversal of 12556226605671 is 17650662265521.

12556226605671 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 6 + 2 + 26 + 605 + 6 + 7 + 1 = 666.

It is not a de Polignac number, because 12556226605671 - 2¹ = 12556226605669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556226615671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57795466 + ... + 58012311.

It is an arithmetic number, because the mean of its divisors is an integer number (864157639436).

Almost surely, 2^{12556226605671} is an apocalyptic number.

12556226605671 is a deficient number, since it is larger than the sum of its proper divisors (8183556740793).

12556226605671 is a wasteful number, since it uses less digits than its factorization.

12556226605671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115809511 (or 115809508 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 12556226605671 in words is "twelve trillion, five hundred fifty-six billion, two hundred twenty-six million, six hundred five thousand, six hundred seventy-one".