812543267863 has 2 divisors, whose sum is σ = 812543267864. Its totient is φ = 812543267862.

The previous prime is 812543267843. The next prime is 812543267903. The reversal of 812543267863 is 368762345218.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812543267863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812543267843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406271633931 + 406271633932.

It is an arithmetic number, because the mean of its divisors is an integer number (406271633932).

Almost surely, 2^812543267863 is an apocalyptic number.

812543267863 is a deficient number, since it is larger than the sum of its proper divisors (1).

812543267863 is an equidigital number, since it uses as much as digits as its factorization.

812543267863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 55.

The spelling of 812543267863 in words is "eight hundred twelve billion, five hundred forty-three million, two hundred sixty-seven thousand, eight hundred sixty-three".