1688802085 has 8 divisors (see below), whose sum is σ = 2027876760. Its totient is φ = 1350165504.

The previous prime is 1688802053. The next prime is 1688802091. The reversal of 1688802085 is 5802088861.

1688802085 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5997601 + 1682804484 = 2449^2 + 41022^2 .

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 1688802085 - 2⁵ = 1688802053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100980 + ... + 116509.

It is an arithmetic number, because the mean of its divisors is an integer number (253484595).

Almost surely, 2^1688802085 is an apocalyptic number.

It is an amenable number.

1688802085 is a deficient number, since it is larger than the sum of its proper divisors (339074675).

1688802085 is a wasteful number, since it uses less digits than its factorization.

1688802085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219047.

The product of its (nonzero) digits is 245760, while the sum is 46.

The square root of 1688802085 is about 41095.0372307898. The cubic root of 1688802085 is about 1190.8569222662.

The spelling of 1688802085 in words is "one billion, six hundred eighty-eight million, eight hundred two thousand, eighty-five".