394285782305663 has 2 divisors, whose sum is σ = 394285782305664. Its totient is φ = 394285782305662.

The previous prime is 394285782305651. The next prime is 394285782305669. The reversal of 394285782305663 is 366503287582493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394285782305663 - 2⁴ = 394285782305647 is a prime.

It is a super-2 number, since 2×394285782305663² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394285782305669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197142891152831 + 197142891152832.

It is an arithmetic number, because the mean of its divisors is an integer number (197142891152832).

Almost surely, 2^{394285782305663} is an apocalyptic number.

394285782305663 is a deficient number, since it is larger than the sum of its proper divisors (1).

394285782305663 is an equidigital number, since it uses as much as digits as its factorization.

394285782305663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1567641600, while the sum is 71.

The spelling of 394285782305663 in words is "three hundred ninety-four trillion, two hundred eighty-five billion, seven hundred eighty-two million, three hundred five thousand, six hundred sixty-three".