1685505355 has 8 divisors (see below), whose sum is σ = 2025105264. Its totient is φ = 1346738400.

The previous prime is 1685505323. The next prime is 1685505397. The reversal of 1685505355 is 5535055861.

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

It is not a de Polignac number, because 1685505355 - 2⁵ = 1685505323 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203776 + ... + 211885.

It is an arithmetic number, because the mean of its divisors is an integer number (253138158).

Almost surely, 2^1685505355 is an apocalyptic number.

1685505355 is a deficient number, since it is larger than the sum of its proper divisors (339599909).

1685505355 is an equidigital number, since it uses as much as digits as its factorization.

1685505355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416477.

The product of its (nonzero) digits is 450000, while the sum is 43.

The square root of 1685505355 is about 41054.9065886162. The cubic root of 1685505355 is about 1190.0815223204.

The spelling of 1685505355 in words is "one billion, six hundred eighty-five million, five hundred five thousand, three hundred fifty-five".