12606557071 has 4 divisors (see below), whose sum is σ = 13154668272. Its totient is φ = 12058445872.

The previous prime is 12606557063. The next prime is 12606557087. The reversal of 12606557071 is 17075560621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12606557071 - 2³ = 12606557063 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12606557471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274055566 + ... + 274055611.

It is an arithmetic number, because the mean of its divisors is an integer number (3288667068).

Almost surely, 2^12606557071 is an apocalyptic number.

12606557071 is a deficient number, since it is larger than the sum of its proper divisors (548111201).

12606557071 is an equidigital number, since it uses as much as digits as its factorization.

12606557071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548111200.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 12606557071 in words is "twelve billion, six hundred six million, five hundred fifty-seven thousand, seventy-one".