2040545509 has 4 divisors (see below), whose sum is σ = 2059266220. Its totient is φ = 2021824800.

The previous prime is 2040545483. The next prime is 2040545537. The reversal of 2040545509 is 9055450402.

It is a happy number.

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 961620100 + 1078925409 = 31010^2 + 32847^2 .

It is a cyclic number.

It is not a de Polignac number, because 2040545509 - 2²⁷ = 1906327781 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 (2040515509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9360192 + ... + 9360409.

It is an arithmetic number, because the mean of its divisors is an integer number (514816555).

Almost surely, 2^2040545509 is an apocalyptic number.

It is an amenable number.

2040545509 is a deficient number, since it is larger than the sum of its proper divisors (18720711).

2040545509 is a wasteful number, since it uses less digits than its factorization.

2040545509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18720710.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 2040545509 is about 45172.3976450221. The cubic root of 2040545509 is about 1268.3781783956.

The spelling of 2040545509 in words is "two billion, forty million, five hundred forty-five thousand, five hundred nine".