643103484688 has 30 divisors (see below), whose sum is σ = 1449443697486. Its totient is φ = 275615778816.

The previous prime is 643103484677. The next prime is 643103484719. The reversal of 643103484688 is 886484301346.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 605950151184 + 37153333504 = 778428^2 + 192752^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 410141745 + ... + 410143312.

Almost surely, 2^643103484688 is an apocalyptic number.

It is an amenable number.

643103484688 is an abundant number, since it is smaller than the sum of its proper divisors (806340212798).

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

643103484688 is a wasteful number, since it uses less digits than its factorization.

643103484688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820285079 (or 820285066 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 55.

The spelling of 643103484688 in words is "six hundred forty-three billion, one hundred three million, four hundred eighty-four thousand, six hundred eighty-eight".