2045645459 has 18 divisors (see below), whose sum is σ = 2418786396. Its totient is φ = 1714989120.

The previous prime is 2045645449. The next prime is 2045645467. The reversal of 2045645459 is 9545465402.

It is not a de Polignac number, because 2045645459 - 2⁴ = 2045645443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2045645419) 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 17 ways as a sum of consecutive naturals, for example, 1949567 + ... + 1950615.

It is an arithmetic number, because the mean of its divisors is an integer number (134377022).

Almost surely, 2^2045645459 is an apocalyptic number.

2045645459 is a deficient number, since it is larger than the sum of its proper divisors (373140937).

2045645459 is an equidigital number, since it uses as much as digits as its factorization.

2045645459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 44.

The square root of 2045645459 is about 45228.8122660766. The cubic root of 2045645459 is about 1269.4339881733.

Multiplying 2045645459 by its sum of digits (44), we get a square (90008400196 = 300014²).

The spelling of 2045645459 in words is "two billion, forty-five million, six hundred forty-five thousand, four hundred fifty-nine".