800243294627639 has 2 divisors, whose sum is σ = 800243294627640. Its totient is φ = 800243294627638.

The previous prime is 800243294627627. The next prime is 800243294627723. The reversal of 800243294627639 is 936726492342008.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800243294627639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800243294647639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400121647313819 + 400121647313820.

It is an arithmetic number, because the mean of its divisors is an integer number (400121647313820).

Almost surely, 2^{800243294627639} is an apocalyptic number.

800243294627639 is a deficient number, since it is larger than the sum of its proper divisors (1).

800243294627639 is an equidigital number, since it uses as much as digits as its factorization.

800243294627639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188116992, while the sum is 65.

The spelling of 800243294627639 in words is "eight hundred trillion, two hundred forty-three billion, two hundred ninety-four million, six hundred twenty-seven thousand, six hundred thirty-nine".