645451434303 has 16 divisors (see below), whose sum is σ = 930884900736. Its totient is φ = 395451093600.

The previous prime is 645451434247. The next prime is 645451434349. The reversal of 645451434303 is 303434154546.

It is not a de Polignac number, because 645451434303 - 2¹⁰ = 645451433279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645451434503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36444973 + ... + 36462678.

It is an arithmetic number, because the mean of its divisors is an integer number (58180306296).

Almost surely, 2^645451434303 is an apocalyptic number.

645451434303 is a deficient number, since it is larger than the sum of its proper divisors (285433466433).

645451434303 is a wasteful number, since it uses less digits than its factorization.

645451434303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72907894.

The product of its (nonzero) digits is 1036800, while the sum is 42.

Adding to 645451434303 its reverse (303434154546), we get a palindrome (948885588849).

The spelling of 645451434303 in words is "six hundred forty-five billion, four hundred fifty-one million, four hundred thirty-four thousand, three hundred three".