643614324 has 12 divisors (see below), whose sum is σ = 1501766784. Its totient is φ = 214538104.

The previous prime is 643614311. The next prime is 643614337. The reversal of 643614324 is 423416346.

643614324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (643614311) and next prime (643614337).

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26817252 + ... + 26817275.

It is an arithmetic number, because the mean of its divisors is an integer number (125147232).

Almost surely, 2^643614324 is an apocalyptic number.

It is an amenable number.

643614324 is an abundant number, since it is smaller than the sum of its proper divisors (858152460).

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

643614324 is a wasteful number, since it uses less digits than its factorization.

643614324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53634534 (or 53634532 counting only the distinct ones).

The product of its digits is 41472, while the sum is 33.

The square root of 643614324 is about 25369.5550611358. Note that the first 3 decimals coincide. The cubic root of 643614324 is about 863.3930869365.

The spelling of 643614324 in words is "six hundred forty-three million, six hundred fourteen thousand, three hundred twenty-four".