840239012663 has 2 divisors, whose sum is σ = 840239012664. Its totient is φ = 840239012662.

The previous prime is 840239012629. The next prime is 840239012677. The reversal of 840239012663 is 366210932048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 840239012663 - 2³² = 835944045367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840239092663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420119506331 + 420119506332.

It is an arithmetic number, because the mean of its divisors is an integer number (420119506332).

Almost surely, 2^840239012663 is an apocalyptic number.

840239012663 is a deficient number, since it is larger than the sum of its proper divisors (1).

840239012663 is an equidigital number, since it uses as much as digits as its factorization.

840239012663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 840239012663 in words is "eight hundred forty billion, two hundred thirty-nine million, twelve thousand, six hundred sixty-three".