811744342847 has 2 divisors, whose sum is σ = 811744342848. Its totient is φ = 811744342846.

The previous prime is 811744342837. The next prime is 811744342867. The reversal of 811744342847 is 748243447118.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811744342847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811744342807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405872171423 + 405872171424.

It is an arithmetic number, because the mean of its divisors is an integer number (405872171424).

Almost surely, 2^811744342847 is an apocalyptic number.

811744342847 is a deficient number, since it is larger than the sum of its proper divisors (1).

811744342847 is an equidigital number, since it uses as much as digits as its factorization.

811744342847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4816896, while the sum is 53.

The spelling of 811744342847 in words is "eight hundred eleven billion, seven hundred forty-four million, three hundred forty-two thousand, eight hundred forty-seven".