643418052 has 24 divisors (see below), whose sum is σ = 1580325600. Its totient is φ = 203184576.

The previous prime is 643418047. The next prime is 643418053. The reversal of 643418052 is 250814346.

643418052 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 (643418053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1410777 + ... + 1411232.

It is an arithmetic number, because the mean of its divisors is an integer number (65846900).

Almost surely, 2^643418052 is an apocalyptic number.

It is an amenable number.

643418052 is an abundant number, since it is smaller than the sum of its proper divisors (936907548).

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

643418052 is a wasteful number, since it uses less digits than its factorization.

643418052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822035 (or 2822033 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 643418052 is about 25365.6865075637. The cubic root of 643418052 is about 863.3053132961.

The spelling of 643418052 in words is "six hundred forty-three million, four hundred eighteen thousand, fifty-two".