811744342867 has 2 divisors, whose sum is σ = 811744342868. Its totient is φ = 811744342866.

The previous prime is 811744342847. The next prime is 811744342883. The reversal of 811744342867 is 768243447118.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811744342867 is a prime.

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, 405872171433 + 405872171434.

It is an arithmetic number, because the mean of its divisors is an integer number (405872171434).

Almost surely, 2^811744342867 is an apocalyptic number.

811744342867 is a deficient number, since it is larger than the sum of its proper divisors (1).

811744342867 is an equidigital number, since it uses as much as digits as its factorization.

811744342867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7225344, while the sum is 55.

The spelling of 811744342867 in words is "eight hundred eleven billion, seven hundred forty-four million, three hundred forty-two thousand, eight hundred sixty-seven".