1685383555 has 4 divisors (see below), whose sum is σ = 2022460272. Its totient is φ = 1348306840.

The previous prime is 1685383549. The next prime is 1685383561. The reversal of 1685383555 is 5553835861.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1685383549) and next prime (1685383561).

It is not a de Polignac number, because 1685383555 - 2²⁷ = 1551165827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1685383499 and 1685383508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168538351 + ... + 168538360.

It is an arithmetic number, because the mean of its divisors is an integer number (505615068).

Almost surely, 2^1685383555 is an apocalyptic number.

1685383555 is a deficient number, since it is larger than the sum of its proper divisors (337076717).

1685383555 is an equidigital number, since it uses as much as digits as its factorization.

1685383555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337076716.

The product of its digits is 2160000, while the sum is 49.

The square root of 1685383555 is about 41053.4231824826. The cubic root of 1685383555 is about 1190.0528552660.

The spelling of 1685383555 in words is "one billion, six hundred eighty-five million, three hundred eighty-three thousand, five hundred fifty-five".