1685355385219 has 8 divisors (see below), whose sum is σ = 1897878205440. Its totient is φ = 1482717347400.

The previous prime is 1685355385213. The next prime is 1685355385243. The reversal of 1685355385219 is 9125835535861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1685355385219 - 2³ = 1685355385211 is a prime.

It is a super-2 number, since 2×1685355385219² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685355385211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2471195239 + ... + 2471195920.

It is an arithmetic number, because the mean of its divisors is an integer number (237234775680).

Almost surely, 2^{1685355385219} is an apocalyptic number.

1685355385219 is a deficient number, since it is larger than the sum of its proper divisors (212522820221).

1685355385219 is a wasteful number, since it uses less digits than its factorization.

1685355385219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4942391201.

The product of its digits is 38880000, while the sum is 61.

The spelling of 1685355385219 in words is "one trillion, six hundred eighty-five billion, three hundred fifty-five million, three hundred eighty-five thousand, two hundred nineteen".