12811236473 has 4 divisors (see below), whose sum is σ = 14641413120. Its totient is φ = 10981059828.

The previous prime is 12811236467. The next prime is 12811236517. The reversal of 12811236473 is 37463211821.

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.

It is a cyclic number.

It is not a de Polignac number, because 12811236473 - 2²⁸ = 12542801017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12811236673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915088313 + ... + 915088326.

It is an arithmetic number, because the mean of its divisors is an integer number (3660353280).

Almost surely, 2^12811236473 is an apocalyptic number.

It is an amenable number.

12811236473 is a deficient number, since it is larger than the sum of its proper divisors (1830176647).

12811236473 is an equidigital number, since it uses as much as digits as its factorization.

12811236473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830176646.

The product of its digits is 48384, while the sum is 38.

The spelling of 12811236473 in words is "twelve billion, eight hundred eleven million, two hundred thirty-six thousand, four hundred seventy-three".