643412682 has 48 divisors (see below), whose sum is σ = 1523733120. Its totient is φ = 194596800.

The previous prime is 643412677. The next prime is 643412683. The reversal of 643412682 is 286214346.

643412682 is a `hidden beast` number, since 643 + 4 + 1 + 2 + 6 + 8 + 2 = 666.

643412682 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (643412683) 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, 109807 + ... + 115517.

It is an arithmetic number, because the mean of its divisors is an integer number (31744440).

Almost surely, 2^643412682 is an apocalyptic number.

643412682 is an abundant number, since it is smaller than the sum of its proper divisors (880320438).

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

643412682 is a wasteful number, since it uses less digits than its factorization.

643412682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6299 (or 6296 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 643412682 is about 25365.5806556838. The cubic root of 643412682 is about 863.3029115594.

The spelling of 643412682 in words is "six hundred forty-three million, four hundred twelve thousand, six hundred eighty-two".