645304312227 has 16 divisors (see below), whose sum is σ = 872994836480. Its totient is φ = 423919179072.

The previous prime is 645304312217. The next prime is 645304312253. The reversal of 645304312227 is 722213403546.

It is not a de Polignac number, because 645304312227 - 2³² = 641009344931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645304312217) 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 15 ways as a sum of consecutive naturals, for example, 1117327 + ... + 1593432.

It is an arithmetic number, because the mean of its divisors is an integer number (54562177280).

Almost surely, 2^645304312227 is an apocalyptic number.

645304312227 is a deficient number, since it is larger than the sum of its proper divisors (227690524253).

645304312227 is a wasteful number, since it uses less digits than its factorization.

645304312227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711922.

The product of its (nonzero) digits is 241920, while the sum is 39.

The spelling of 645304312227 in words is "six hundred forty-five billion, three hundred four million, three hundred twelve thousand, two hundred twenty-seven".