1688080809 has 8 divisors (see below), whose sum is σ = 2277892512. Its totient is φ = 1111828160.

The previous prime is 1688080777. The next prime is 1688080819. The reversal of 1688080809 is 9080808861.

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

It is not a de Polignac number, because 1688080809 - 2⁵ = 1688080777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1688080819) 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, 3389472 + ... + 3389969.

It is an arithmetic number, because the mean of its divisors is an integer number (284736564).

Almost surely, 2^1688080809 is an apocalyptic number.

It is an amenable number.

1688080809 is a deficient number, since it is larger than the sum of its proper divisors (589811703).

1688080809 is an equidigital number, since it uses as much as digits as its factorization.

1688080809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6779527.

The product of its (nonzero) digits is 221184, while the sum is 48.

The square root of 1688080809 is about 41086.2605867217. The cubic root of 1688080809 is about 1190.6873624667.

The spelling of 1688080809 in words is "one billion, six hundred eighty-eight million, eighty thousand, eight hundred nine".