643634824132 has 24 divisors (see below), whose sum is σ = 1152682977600. Its totient is φ = 314298487776.

The previous prime is 643634824097. The next prime is 643634824163. The reversal of 643634824132 is 231428436346.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1386594 + ... + 1791622.

It is an arithmetic number, because the mean of its divisors is an integer number (48028457400).

Almost surely, 2^643634824132 is an apocalyptic number.

It is an amenable number.

643634824132 is a deficient number, since it is larger than the sum of its proper divisors (509048153468).

643634824132 is a wasteful number, since it uses less digits than its factorization.

643634824132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414315 (or 414313 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 46.

The spelling of 643634824132 in words is "six hundred forty-three billion, six hundred thirty-four million, eight hundred twenty-four thousand, one hundred thirty-two".