1685018518357 has 2 divisors, whose sum is σ = 1685018518358. Its totient is φ = 1685018518356.

The previous prime is 1685018518327. The next prime is 1685018518397. The reversal of 1685018518357 is 7538158105861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1028928238321 + 656090280036 = 1014361^2 + 809994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1685018518357 - 2¹¹ = 1685018516309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1685018518327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842509259178 + 842509259179.

It is an arithmetic number, because the mean of its divisors is an integer number (842509259179).

Almost surely, 2^{1685018518357} is an apocalyptic number.

It is an amenable number.

1685018518357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685018518357 is an equidigital number, since it uses as much as digits as its factorization.

1685018518357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064000, while the sum is 58.

The spelling of 1685018518357 in words is "one trillion, six hundred eighty-five billion, eighteen million, five hundred eighteen thousand, three hundred fifty-seven".