2805580405 has 4 divisors (see below), whose sum is σ = 3366696492. Its totient is φ = 2244464320.

The previous prime is 2805580403. The next prime is 2805580409. The reversal of 2805580405 is 5040855082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5040855082 = 2 ⋅2520427541.

It can be written as a sum of positive squares in 2 ways, for example, as 1312685361 + 1492895044 = 36231^2 + 38638^2 .

It is not a de Polignac number, because 2805580405 - 2¹ = 2805580403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805580403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280558036 + ... + 280558045.

It is an arithmetic number, because the mean of its divisors is an integer number (841674123).

Almost surely, 2^2805580405 is an apocalyptic number.

It is an amenable number.

2805580405 is a deficient number, since it is larger than the sum of its proper divisors (561116087).

2805580405 is an equidigital number, since it uses as much as digits as its factorization.

2805580405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561116086.

The product of its (nonzero) digits is 64000, while the sum is 37.

The square root of 2805580405 is about 52967.7298456334. The cubic root of 2805580405 is about 1410.3954769810.

The spelling of 2805580405 in words is "two billion, eight hundred five million, five hundred eighty thousand, four hundred five".