12811436782847 has 4 divisors (see below), whose sum is σ = 12893038291176. Its totient is φ = 12729835274520.

The previous prime is 12811436782831. The next prime is 12811436782867. The reversal of 12811436782847 is 74828763411821.

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

It is a cyclic number.

It is not a de Polignac number, because 12811436782847 - 2⁴ = 12811436782831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12811436782847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12811436782867) 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, 40800753929 + ... + 40800754242.

It is an arithmetic number, because the mean of its divisors is an integer number (3223259572794).

Almost surely, 2^{12811436782847} is an apocalyptic number.

12811436782847 is a deficient number, since it is larger than the sum of its proper divisors (81601508329).

12811436782847 is an equidigital number, since it uses as much as digits as its factorization.

12811436782847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81601508328.

The product of its digits is 28901376, while the sum is 62.

The spelling of 12811436782847 in words is "twelve trillion, eight hundred eleven billion, four hundred thirty-six million, seven hundred eighty-two thousand, eight hundred forty-seven".