1681800682 has 8 divisors (see below), whose sum is σ = 2522882052. Its totient is φ = 840840000.

The previous prime is 1681800619. The next prime is 1681800691. The reversal of 1681800682 is 2860081861.

It can be written as a sum of positive squares in 2 ways, for example, as 1580778081 + 101022601 = 39759^2 + 10051^2 .

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

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, 24432 + ... + 62932.

Almost surely, 2^1681800682 is an apocalyptic number.

1681800682 is a deficient number, since it is larger than the sum of its proper divisors (841081370).

1681800682 is a wasteful number, since it uses less digits than its factorization.

1681800682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60344.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 1681800682 is about 41009.7632521818. The cubic root of 1681800682 is about 1189.2089656144.

The spelling of 1681800682 in words is "one billion, six hundred eighty-one million, eight hundred thousand, six hundred eighty-two".