12791873257 has 4 divisors (see below), whose sum is σ = 12935602260. Its totient is φ = 12648144256.

The previous prime is 12791873243. The next prime is 12791873267. The reversal of 12791873257 is 75237819721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 798119001 + 11993754256 = 28251^2 + 109516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12791873257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12791873267) 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, 71864368 + ... + 71864545.

It is an arithmetic number, because the mean of its divisors is an integer number (3233900565).

Almost surely, 2^12791873257 is an apocalyptic number.

It is an amenable number.

12791873257 is a deficient number, since it is larger than the sum of its proper divisors (143729003).

12791873257 is an equidigital number, since it uses as much as digits as its factorization.

12791873257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143729002.

The product of its digits is 1481760, while the sum is 52.

The spelling of 12791873257 in words is "twelve billion, seven hundred ninety-one million, eight hundred seventy-three thousand, two hundred fifty-seven".