643500014252 has 48 divisors (see below), whose sum is σ = 1139261760000. Its totient is φ = 318020260992.

The previous prime is 643500014251. The next prime is 643500014291. The reversal of 643500014252 is 252410005346.

It is not an unprimeable number, because it can be changed into a prime (643500014251) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 128723249 + ... + 128728247.

It is an arithmetic number, because the mean of its divisors is an integer number (23734620000).

Almost surely, 2^643500014252 is an apocalyptic number.

It is an amenable number.

643500014252 is a deficient number, since it is larger than the sum of its proper divisors (495761745748).

643500014252 is a wasteful number, since it uses less digits than its factorization.

643500014252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6110 (or 6108 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 643500014252 its reverse (252410005346), we get a palindrome (895910019598).

The spelling of 643500014252 in words is "six hundred forty-three billion, five hundred million, fourteen thousand, two hundred fifty-two".