2445005809 has 9 divisors (see below), whose sum is σ = 2467309771. Its totient is φ = 2422903000.

The previous prime is 2445005791. The next prime is 2445005813. The reversal of 2445005809 is 9085005442.

The square root of 2445005809 is 49447.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2395613025 + 49392784 = 48945^2 + 7028^2 .

It is not a de Polignac number, because 2445005809 - 2²⁹ = 1908134897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2445005209) 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 8 ways as a sum of consecutive naturals, for example, 9740934 + ... + 9741184.

Almost surely, 2^2445005809 is an apocalyptic number.

2445005809 is the 49447-th square number.

2445005809 is the 24724-th centered octagonal number.

It is an amenable number.

2445005809 is a deficient number, since it is larger than the sum of its proper divisors (22303962).

2445005809 is an frugal number, since it uses more digits than its factorization.

2445005809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896 (or 448 counting only the distinct ones).

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

The cubic root of 2445005809 is about 1347.1831175681.

Multiplying 2445005809 by its product of nonzero digits (57600), we get a square (140832334598400 = 11867280²).

The spelling of 2445005809 in words is "two billion, four hundred forty-five million, five thousand, eight hundred nine".