645633453200 has 60 divisors (see below), whose sum is σ = 1559800099440. Its totient is φ = 256810596480.

The previous prime is 645633453181. The next prime is 645633453239. The reversal of 645633453200 is 2354336546.

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, 4437014 + ... + 4580213.

It is an arithmetic number, because the mean of its divisors is an integer number (25996668324).

Almost surely, 2^645633453200 is an apocalyptic number.

It is an amenable number.

645633453200 is an abundant number, since it is smaller than the sum of its proper divisors (914166646240).

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

645633453200 is a wasteful number, since it uses less digits than its factorization.

645633453200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9017424 (or 9017413 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 41.

Adding to 645633453200 its reverse (2354336546), we get a palindrome (647987789746).

The spelling of 645633453200 in words is "six hundred forty-five billion, six hundred thirty-three million, four hundred fifty-three thousand, two hundred".