1685018518223 has 2 divisors, whose sum is σ = 1685018518224. Its totient is φ = 1685018518222.

The previous prime is 1685018518207. The next prime is 1685018518247. The reversal of 1685018518223 is 3228158105861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1685018518223 - 2⁴ = 1685018518207 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1685018515223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842509259111 + 842509259112.

It is an arithmetic number, because the mean of its divisors is an integer number (842509259112).

Almost surely, 2^{1685018518223} is an apocalyptic number.

1685018518223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685018518223 is an equidigital number, since it uses as much as digits as its factorization.

1685018518223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 921600, while the sum is 50.

The spelling of 1685018518223 in words is "one trillion, six hundred eighty-five billion, eighteen million, five hundred eighteen thousand, two hundred twenty-three".