12811436782831 has 2 divisors, whose sum is σ = 12811436782832. Its totient is φ = 12811436782830.

The previous prime is 12811436782829. The next prime is 12811436782867. The reversal of 12811436782831 is 13828763411821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12811436782831 - 2¹ = 12811436782829 is a prime.

It is a super-2 number, since 2×12811436782831² (a number of 27 digits) contains 22 as substring.

Together with 12811436782829, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12811436782891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405718391415 + 6405718391416.

It is an arithmetic number, because the mean of its divisors is an integer number (6405718391416).

Almost surely, 2^{12811436782831} is an apocalyptic number.

12811436782831 is a deficient number, since it is larger than the sum of its proper divisors (1).

12811436782831 is an equidigital number, since it uses as much as digits as its factorization.

12811436782831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 55.

The spelling of 12811436782831 in words is "twelve trillion, eight hundred eleven billion, four hundred thirty-six million, seven hundred eighty-two thousand, eight hundred thirty-one".