2005782845 has 16 divisors (see below), whose sum is σ = 2626630848. Its totient is φ = 1458263040.

The previous prime is 2005782829. The next prime is 2005782931. The reversal of 2005782845 is 5482875002.

It is not a de Polignac number, because 2005782845 - 2⁴ = 2005782829 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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283997 + ... + 290973.

It is an arithmetic number, because the mean of its divisors is an integer number (164164428).

Almost surely, 2^2005782845 is an apocalyptic number.

It is an amenable number.

2005782845 is a deficient number, since it is larger than the sum of its proper divisors (620848003).

2005782845 is a wasteful number, since it uses less digits than its factorization.

2005782845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12220.

The product of its (nonzero) digits is 179200, while the sum is 41.

The square root of 2005782845 is about 44785.9670544245. The cubic root of 2005782845 is about 1261.1342027565.

The spelling of 2005782845 in words is "two billion, five million, seven hundred eighty-two thousand, eight hundred forty-five".