645063436300 has 36 divisors (see below), whose sum is σ = 1404733964536. Its totient is φ = 257113612800.

The previous prime is 645063436253. The next prime is 645063436379. The reversal of 645063436300 is 3634360546.

It is a happy number.

It is a super-2 number, since 2×645063436300² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11368581 + ... + 11425180.

Almost surely, 2^645063436300 is an apocalyptic number.

It is an amenable number.

645063436300 is an abundant number, since it is smaller than the sum of its proper divisors (759670528236).

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

645063436300 is a wasteful number, since it uses less digits than its factorization.

645063436300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22794058 (or 22794051 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 40.

Adding to 645063436300 its reverse (3634360546), we get a palindrome (648697796846).

The spelling of 645063436300 in words is "six hundred forty-five billion, sixty-three million, four hundred thirty-six thousand, three hundred".