643321829831360 has 28 divisors (see below), whose sum is σ = 1531910107286688. Its totient is φ = 257328731932416.

The previous prime is 643321829831347. The next prime is 643321829831381. The reversal of 643321829831360 is 63138928123346.

It is a self number, because there is not a number n which added to its sum of digits gives 643321829831360.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005190358792 + ... + 1005190359431.

Almost surely, 2^{643321829831360} is an apocalyptic number.

It is an amenable number.

643321829831360 is an abundant number, since it is smaller than the sum of its proper divisors (888588277455328).

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

643321829831360 is a wasteful number, since it uses less digits than its factorization.

643321829831360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010380718240 (or 2010380718230 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 59.

The spelling of 643321829831360 in words is "six hundred forty-three trillion, three hundred twenty-one billion, eight hundred twenty-nine million, eight hundred thirty-one thousand, three hundred sixty".