12571986671 has 4 divisors (see below), whose sum is σ = 13233670200. Its totient is φ = 11910303144.

The previous prime is 12571986641. The next prime is 12571986673. The reversal of 12571986671 is 17668917521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17668917521 = 163 ⋅108398267.

It is a cyclic number.

It is not a de Polignac number, because 12571986671 - 2¹⁴ = 12571970287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12571986673) 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, 330841736 + ... + 330841773.

It is an arithmetic number, because the mean of its divisors is an integer number (3308417550).

Almost surely, 2^12571986671 is an apocalyptic number.

12571986671 is a deficient number, since it is larger than the sum of its proper divisors (661683529).

12571986671 is an equidigital number, since it uses as much as digits as its factorization.

12571986671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661683528.

The product of its digits is 1270080, while the sum is 53.

The spelling of 12571986671 in words is "twelve billion, five hundred seventy-one million, nine hundred eighty-six thousand, six hundred seventy-one".