12717661273 has 4 divisors (see below), whose sum is σ = 12788709840. Its totient is φ = 12646612708.

The previous prime is 12717661207. The next prime is 12717661283. The reversal of 12717661273 is 37216671721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37216671721 = 503 ⋅73989407.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12717661273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12717661283) 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, 35524015 + ... + 35524372.

It is an arithmetic number, because the mean of its divisors is an integer number (3197177460).

Almost surely, 2^12717661273 is an apocalyptic number.

It is an amenable number.

12717661273 is a deficient number, since it is larger than the sum of its proper divisors (71048567).

12717661273 is an equidigital number, since it uses as much as digits as its factorization.

12717661273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71048566.

The product of its digits is 148176, while the sum is 43.

The spelling of 12717661273 in words is "twelve billion, seven hundred seventeen million, six hundred sixty-one thousand, two hundred seventy-three".