643300616055 has 16 divisors (see below), whose sum is σ = 1029440250720. Its totient is φ = 343040573568.

The previous prime is 643300616033. The next prime is 643300616081. The reversal of 643300616055 is 550616003346.

It is a happy number.

It is not a de Polignac number, because 643300616055 - 2¹⁰ = 643300615031 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3217752 + ... + 3411821.

It is an arithmetic number, because the mean of its divisors is an integer number (64340015670).

Almost surely, 2^643300616055 is an apocalyptic number.

643300616055 is a deficient number, since it is larger than the sum of its proper divisors (386139634665).

643300616055 is a wasteful number, since it uses less digits than its factorization.

643300616055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6636050.

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 643300616055 in words is "six hundred forty-three billion, three hundred million, six hundred sixteen thousand, fifty-five".