865342243567 has 2 divisors, whose sum is σ = 865342243568. Its totient is φ = 865342243566.

The previous prime is 865342243547. The next prime is 865342243583. The reversal of 865342243567 is 765342243568.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865342243567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865342243547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432671121783 + 432671121784.

It is an arithmetic number, because the mean of its divisors is an integer number (432671121784).

Almost surely, 2^865342243567 is an apocalyptic number.

865342243567 is a deficient number, since it is larger than the sum of its proper divisors (1).

865342243567 is an equidigital number, since it uses as much as digits as its factorization.

865342243567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29030400, while the sum is 55.

Subtracting from 865342243567 its reverse (765342243568), we obtain a palindrome (99999999999).

The spelling of 865342243567 in words is "eight hundred sixty-five billion, three hundred forty-two million, two hundred forty-three thousand, five hundred sixty-seven".