643843211159 has 16 divisors (see below), whose sum is σ = 656374488000. Its totient is φ = 631436083200.

The previous prime is 643843211149. The next prime is 643843211183. The reversal of 643843211159 is 951112348346.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 643843211159 - 2⁸ = 643843210903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643843211149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52385687 + ... + 52397975.

It is an arithmetic number, because the mean of its divisors is an integer number (41023405500).

Almost surely, 2^643843211159 is an apocalyptic number.

643843211159 is a deficient number, since it is larger than the sum of its proper divisors (12531276841).

643843211159 is a wasteful number, since it uses less digits than its factorization.

643843211159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17258.

The product of its digits is 622080, while the sum is 47.

The spelling of 643843211159 in words is "six hundred forty-three billion, eight hundred forty-three million, two hundred eleven thousand, one hundred fifty-nine".