12851283961 has 4 divisors (see below), whose sum is σ = 12995680500. Its totient is φ = 12706887424.

The previous prime is 12851283959. The next prime is 12851284013. The reversal of 12851283961 is 16938215821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16938215821 = 21101 ⋅802721.

It can be written as a sum of positive squares in 2 ways, for example, as 5722014736 + 7129269225 = 75644^2 + 84435^2 .

It is not a de Polignac number, because 12851283961 - 2¹ = 12851283959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12851283901) 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, 72198136 + ... + 72198313.

It is an arithmetic number, because the mean of its divisors is an integer number (3248920125).

Almost surely, 2^12851283961 is an apocalyptic number.

It is an amenable number.

12851283961 is a deficient number, since it is larger than the sum of its proper divisors (144396539).

12851283961 is an equidigital number, since it uses as much as digits as its factorization.

12851283961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144396538.

The product of its digits is 207360, while the sum is 46.

The spelling of 12851283961 in words is "twelve billion, eight hundred fifty-one million, two hundred eighty-three thousand, nine hundred sixty-one".