2045320045 has 4 divisors (see below), whose sum is σ = 2454384060. Its totient is φ = 1636256032.

The previous prime is 2045320027. The next prime is 2045320049. The reversal of 2045320045 is 5400235402.

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 954933604 + 1090386441 = 30902^2 + 33021^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045320045 - 2⁹ = 2045319533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045320049) 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 3 ways as a sum of consecutive naturals, for example, 204532000 + ... + 204532009.

It is an arithmetic number, because the mean of its divisors is an integer number (613596015).

Almost surely, 2^2045320045 is an apocalyptic number.

It is an amenable number.

2045320045 is a deficient number, since it is larger than the sum of its proper divisors (409064015).

2045320045 is an equidigital number, since it uses as much as digits as its factorization.

2045320045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409064014.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 2045320045 is about 45225.2147037468. The cubic root of 2045320045 is about 1269.3666722565.

Adding to 2045320045 its reverse (5400235402), we get a palindrome (7445555447).

The spelling of 2045320045 in words is "two billion, forty-five million, three hundred twenty thousand, forty-five".