1682645005 has 4 divisors (see below), whose sum is σ = 2019174012. Its totient is φ = 1346116000.

The previous prime is 1682644981. The next prime is 1682645021. The reversal of 1682645005 is 5005462861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5005462861 = 7 ⋅715066123.

It can be written as a sum of positive squares in 2 ways, for example, as 1095212836 + 587432169 = 33094^2 + 24237^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1682645005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168264496 + ... + 168264505.

It is an arithmetic number, because the mean of its divisors is an integer number (504793503).

Almost surely, 2^1682645005 is an apocalyptic number.

It is an amenable number.

1682645005 is a deficient number, since it is larger than the sum of its proper divisors (336529007).

1682645005 is an equidigital number, since it uses as much as digits as its factorization.

1682645005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336529006.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 1682645005 is about 41020.0561311171. The cubic root of 1682645005 is about 1189.4079405409.

It can be divided in two parts, 168264 and 5005, that multiplied together give a triangular number (842161320 = T₄₁₀₄₀).

The spelling of 1682645005 in words is "one billion, six hundred eighty-two million, six hundred forty-five thousand, five".