643530505035346 has 16 divisors (see below), whose sum is σ = 965515475328768. Its totient is φ = 321692014641600.

The previous prime is 643530505035343. The next prime is 643530505035391.

643530505035346 is nontrivially palindromic in base 10.

643530505035346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×643530505035346³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 643530505035293 and 643530505035302.

It is not an unprimeable number, because it can be changed into a prime (643530505035343) 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, 1144907251 + ... + 1145469193.

It is an arithmetic number, because the mean of its divisors is an integer number (60344717208048).

Almost surely, 2^{643530505035346} is an apocalyptic number.

643530505035346 is a deficient number, since it is larger than the sum of its proper divisors (321984970293422).

643530505035346 is a wasteful number, since it uses less digits than its factorization.

643530505035346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691257.

The product of its (nonzero) digits is 29160000, while the sum is 52.

It can be divided in two parts, 64353050 and 5035346, that added together give a palindrome (69388396).

The spelling of 643530505035346 in words is "six hundred forty-three trillion, five hundred thirty billion, five hundred five million, thirty-five thousand, three hundred forty-six".