12851790173 has 4 divisors (see below), whose sum is σ = 12861761820. Its totient is φ = 12841818528.

The previous prime is 12851790157. The next prime is 12851790179. The reversal of 12851790173 is 37109715821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37109715821 = 43 ⋅863016647.

It can be written as a sum of positive squares in 2 ways, for example, as 3809111524 + 9042678649 = 61718^2 + 95093^2 .

It is a cyclic number.

It is not a de Polignac number, because 12851790173 - 2⁴ = 12851790157 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 (12851790179) 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, 4983890 + ... + 4986467.

It is an arithmetic number, because the mean of its divisors is an integer number (3215440455).

Almost surely, 2^12851790173 is an apocalyptic number.

It is an amenable number.

12851790173 is a deficient number, since it is larger than the sum of its proper divisors (9971647).

12851790173 is an equidigital number, since it uses as much as digits as its factorization.

12851790173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9971646.

The product of its (nonzero) digits is 105840, while the sum is 44.

The spelling of 12851790173 in words is "twelve billion, eight hundred fifty-one million, seven hundred ninety thousand, one hundred seventy-three".