2045013805 has 4 divisors (see below), whose sum is σ = 2454016572. Its totient is φ = 1636011040.

The previous prime is 2045013727. The next prime is 2045013821. The reversal of 2045013805 is 5083105402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1481711049 + 563302756 = 38493^2 + 23734^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2045013805 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 3 ways as a sum of consecutive naturals, for example, 204501376 + ... + 204501385.

It is an arithmetic number, because the mean of its divisors is an integer number (613504143).

Almost surely, 2^2045013805 is an apocalyptic number.

It is an amenable number.

2045013805 is a deficient number, since it is larger than the sum of its proper divisors (409002767).

2045013805 is an equidigital number, since it uses as much as digits as its factorization.

2045013805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409002766.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2045013805 is about 45221.8288551005. The cubic root of 2045013805 is about 1269.3033161975.

The spelling of 2045013805 in words is "two billion, forty-five million, thirteen thousand, eight hundred five".