643165216663201 has 8 divisors (see below), whose sum is σ = 658198350109440. Its totient is φ = 628188281847648.

The previous prime is 643165216663159. The next prime is 643165216663213. The reversal of 643165216663201 is 102366612561346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 643165216663201 - 2²⁹ = 643164679792289 is a prime.

It is a super-2 number, since 2×643165216663201² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643165216663261) 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, 14049634516 + ... + 14049680293.

It is an arithmetic number, because the mean of its divisors is an integer number (82274793763680).

Almost surely, 2^{643165216663201} is an apocalyptic number.

It is an amenable number.

643165216663201 is a deficient number, since it is larger than the sum of its proper divisors (15033133446239).

643165216663201 is a wasteful number, since it uses less digits than its factorization.

643165216663201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28099315343.

The product of its (nonzero) digits is 5598720, while the sum is 52.

The spelling of 643165216663201 in words is "six hundred forty-three trillion, one hundred sixty-five billion, two hundred sixteen million, six hundred sixty-three thousand, two hundred one".