645300446450 has 96 divisors (see below), whose sum is σ = 1369398638592. Its totient is φ = 223943720000.

The previous prime is 645300446443. The next prime is 645300446491. The reversal of 645300446450 is 54644003546.

It is a junction number, because it is equal to n+sod(n) for n = 645300446398 and 645300446407.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 5546375 + ... + 5661525.

It is an arithmetic number, because the mean of its divisors is an integer number (14264569152).

Almost surely, 2^645300446450 is an apocalyptic number.

645300446450 is an abundant number, since it is smaller than the sum of its proper divisors (724098192142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645300446450 is a wasteful number, since it uses less digits than its factorization.

645300446450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115640 (or 115635 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 41.

Adding to 645300446450 its reverse (54644003546), we get a palindrome (699944449996).

The spelling of 645300446450 in words is "six hundred forty-five billion, three hundred million, four hundred forty-six thousand, four hundred fifty".