643221300284 has 6 divisors (see below), whose sum is σ = 1125637275504. Its totient is φ = 321610650140.

The previous prime is 643221300251. The next prime is 643221300349. The reversal of 643221300284 is 482003122346.

It is a super-2 number, since 2×643221300284² (a number of 24 digits) contains 22 as substring.

It is a congruent 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 as a sum of consecutive naturals, namely, 80402662532 + ... + 80402662539.

It is an arithmetic number, because the mean of its divisors is an integer number (187606212584).

Almost surely, 2^643221300284 is an apocalyptic number.

It is an amenable number.

643221300284 is a deficient number, since it is larger than the sum of its proper divisors (482415975220).

643221300284 is a wasteful number, since it uses less digits than its factorization.

643221300284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160805325075 (or 160805325073 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The spelling of 643221300284 in words is "six hundred forty-three billion, two hundred twenty-one million, three hundred thousand, two hundred eighty-four".