643624026654160 has 20 divisors (see below), whose sum is σ = 1496425861971108. Its totient is φ = 257449610661632.

The previous prime is 643624026654043. The next prime is 643624026654181. The reversal of 643624026654160 is 61456620426346.

643624026654160 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 309799847681424 + 333824178972736 = 17601132^2 + 18270856^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4022650166509 + ... + 4022650166668.

Almost surely, 2^{643624026654160} is an apocalyptic number.

It is an amenable number.

643624026654160 is an abundant number, since it is smaller than the sum of its proper divisors (852801835316948).

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

643624026654160 is a wasteful number, since it uses less digits than its factorization.

643624026654160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8045300333190 (or 8045300333184 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 55.

The spelling of 643624026654160 in words is "six hundred forty-three trillion, six hundred twenty-four billion, twenty-six million, six hundred fifty-four thousand, one hundred sixty".