643361060 has 24 divisors (see below), whose sum is σ = 1409800896. Its totient is φ = 246155360.

The previous prime is 643361057. The next prime is 643361111. The reversal of 643361060 is 60163346.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698846 + ... + 699765.

It is an arithmetic number, because the mean of its divisors is an integer number (58741704).

Almost surely, 2^643361060 is an apocalyptic number.

It is an amenable number.

643361060 is an abundant number, since it is smaller than the sum of its proper divisors (766439836).

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

643361060 is a wasteful number, since it uses less digits than its factorization.

643361060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398643 (or 1398641 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 643361060 is about 25364.5630752828. The cubic root of 643361060 is about 863.2798228968.

The spelling of 643361060 in words is "six hundred forty-three million, three hundred sixty-one thousand, sixty".