2805749565 has 32 divisors (see below), whose sum is σ = 4658878080. Its totient is φ = 1440171264.

The previous prime is 2805749549. The next prime is 2805749567. The reversal of 2805749565 is 5659475082.

It is not a de Polignac number, because 2805749565 - 2⁴ = 2805749549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805749567) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 127722 + ... + 148068.

It is an arithmetic number, because the mean of its divisors is an integer number (145589940).

Almost surely, 2^2805749565 is an apocalyptic number.

It is an amenable number.

2805749565 is a deficient number, since it is larger than the sum of its proper divisors (1853128515).

2805749565 is a wasteful number, since it uses less digits than its factorization.

2805749565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20701.

The product of its (nonzero) digits is 3024000, while the sum is 51.

The square root of 2805749565 is about 52969.3266428789. The cubic root of 2805749565 is about 1410.4238225957.

The spelling of 2805749565 in words is "two billion, eight hundred five million, seven hundred forty-nine thousand, five hundred sixty-five".