643221360282 has 16 divisors (see below), whose sum is σ = 1286597496672. Its totient is φ = 214381324080.

The previous prime is 643221360281. The next prime is 643221360283. The reversal of 643221360282 is 282063122346.

It is an interprime number because it is at equal distance from previous prime (643221360281) and next prime (643221360283).

It is a self number, because there is not a number n which added to its sum of digits gives 643221360282.

It is not an unprimeable number, because it can be changed into a prime (643221360281) 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, 6394944 + ... + 6494747.

It is an arithmetic number, because the mean of its divisors is an integer number (80412343542).

Almost surely, 2^643221360282 is an apocalyptic number.

643221360282 is an abundant number, since it is smaller than the sum of its proper divisors (643376136390).

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

643221360282 is a wasteful number, since it uses less digits than its factorization.

643221360282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12898013.

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 643221360282 in words is "six hundred forty-three billion, two hundred twenty-one million, three hundred sixty thousand, two hundred eighty-two".