12726656205 has 16 divisors (see below), whose sum is σ = 20365318080. Its totient is φ = 6786660608.

The previous prime is 12726656167. The next prime is 12726656213. The reversal of 12726656205 is 50265662721.

It is a cyclic number.

It is not a de Polignac number, because 12726656205 - 2⁹ = 12726655693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72181 + ... + 175109.

It is an arithmetic number, because the mean of its divisors is an integer number (1272832380).

Almost surely, 2^12726656205 is an apocalyptic number.

12726656205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12726656205 is a deficient number, since it is larger than the sum of its proper divisors (7638661875).

12726656205 is a wasteful number, since it uses less digits than its factorization.

12726656205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111180.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 12726656205 in words is "twelve billion, seven hundred twenty-six million, six hundred fifty-six thousand, two hundred five".