645300441252 has 72 divisors (see below), whose sum is σ = 1705974990720. Its totient is φ = 205279176960.

The previous prime is 645300441221. The next prime is 645300441259. The reversal of 645300441252 is 252144003546.

645300441252 is a `hidden beast` number, since 64 + 5 + 300 + 4 + 41 + 252 = 666.

645300441252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (645300441259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 524149 + ... + 1251132.

Almost surely, 2^645300441252 is an apocalyptic number.

It is an amenable number.

645300441252 is an abundant number, since it is smaller than the sum of its proper divisors (1060674549468).

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

645300441252 is a wasteful number, since it uses less digits than its factorization.

645300441252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775753 (or 1775748 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 645300441252 its reverse (252144003546), we get a palindrome (897444444798).

The spelling of 645300441252 in words is "six hundred forty-five billion, three hundred million, four hundred forty-one thousand, two hundred fifty-two".