645450303 has 16 divisors (see below), whose sum is σ = 901555200. Its totient is φ = 410198880.

The previous prime is 645450293. The next prime is 645450307. The reversal of 645450303 is 303054546.

It is not a de Polignac number, because 645450303 - 2²⁰ = 644401727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645450307) 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 15 ways as a sum of consecutive naturals, for example, 40083 + ... + 53828.

It is an arithmetic number, because the mean of its divisors is an integer number (56347200).

Almost surely, 2^645450303 is an apocalyptic number.

645450303 is a deficient number, since it is larger than the sum of its proper divisors (256104897).

645450303 is a wasteful number, since it uses less digits than its factorization.

645450303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94022.

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 645450303 is about 25405.7139832755. The cubic root of 645450303 is about 864.2132813763.

The spelling of 645450303 in words is "six hundred forty-five million, four hundred fifty thousand, three hundred three".