643255433034 has 8 divisors (see below), whose sum is σ = 1286510866080. Its totient is φ = 214418477676.

The previous prime is 643255432999. The next prime is 643255433059. The reversal of 643255433034 is 430334552346.

It is a sphenic number, since it is the product of 3 distinct primes.

643255433034 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53604619414 + ... + 53604619425.

It is an arithmetic number, because the mean of its divisors is an integer number (160813858260).

Almost surely, 2^643255433034 is an apocalyptic number.

643255433034 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

643255433034 is a wasteful number, since it uses less digits than its factorization.

643255433034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107209238844.

The product of its (nonzero) digits is 1555200, while the sum is 42.

The spelling of 643255433034 in words is "six hundred forty-three billion, two hundred fifty-five million, four hundred thirty-three thousand, thirty-four".