1685736818 has 8 divisors (see below), whose sum is σ = 2529873648. Its totient is φ = 842445604.

The previous prime is 1685736809. The next prime is 1685736821. The reversal of 1685736818 is 8186375861.

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

It is a super-3 number, since 3×1685736818³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1685736818.

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, 206396 + ... + 214407.

It is an arithmetic number, because the mean of its divisors is an integer number (316234206).

Almost surely, 2^1685736818 is an apocalyptic number.

1685736818 is a deficient number, since it is larger than the sum of its proper divisors (844136830).

1685736818 is a wasteful number, since it uses less digits than its factorization.

1685736818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422808.

The product of its digits is 1935360, while the sum is 53.

The square root of 1685736818 is about 41057.7254362684. The cubic root of 1685736818 is about 1190.1359960386.

The spelling of 1685736818 in words is "one billion, six hundred eighty-five million, seven hundred thirty-six thousand, eight hundred eighteen".