645304342016 has 40 divisors (see below), whose sum is σ = 1289431306680. Its totient is φ = 322631405568.

The previous prime is 645304341959. The next prime is 645304342057. The reversal of 645304342016 is 610243403546.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10694780 + ... + 10754948.

It is an arithmetic number, because the mean of its divisors is an integer number (32235782667).

Almost surely, 2^645304342016 is an apocalyptic number.

It is an amenable number.

645304342016 is a deficient number, since it is larger than the sum of its proper divisors (644126964664).

645304342016 is an equidigital number, since it uses as much as digits as its factorization.

645304342016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81134 (or 81118 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 645304342016 in words is "six hundred forty-five billion, three hundred four million, three hundred forty-two thousand, sixteen".