12767720671 has 4 divisors (see below), whose sum is σ = 12770044632. Its totient is φ = 12765396712.

The previous prime is 12767720629. The next prime is 12767720677. The reversal of 12767720671 is 17602776721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17602776721 = 193 ⋅91206097.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12767720671 is a prime.

It is a super-2 number, since 2×12767720671² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12767720677) 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, 1153720 + ... + 1164733.

It is an arithmetic number, because the mean of its divisors is an integer number (3192511158).

Almost surely, 2^12767720671 is an apocalyptic number.

12767720671 is a deficient number, since it is larger than the sum of its proper divisors (2323961).

12767720671 is an equidigital number, since it uses as much as digits as its factorization.

12767720671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323960.

The product of its (nonzero) digits is 345744, while the sum is 46.

The spelling of 12767720671 in words is "twelve billion, seven hundred sixty-seven million, seven hundred twenty thousand, six hundred seventy-one".