643324343423346 has 64 divisors (see below), whose sum is σ = 1606517869904640. Its totient is φ = 189339606086400.

The previous prime is 643324343423317. The next prime is 643324343423353.

643324343423346 is a `hidden beast` number, since 6 + 4 + 3 + 3 + 24 + 343 + 4 + 233 + 46 = 666.

643324343423346 is nontrivially palindromic in base 10.

643324343423346 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 3×643324343423346³ (a number of 45 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 643324343423292 and 643324343423301.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19922080455 + ... + 19922112746.

It is an arithmetic number, because the mean of its divisors is an integer number (25101841717260).

Almost surely, 2^{643324343423346} is an apocalyptic number.

643324343423346 is an abundant number, since it is smaller than the sum of its proper divisors (963193526481294).

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

643324343423346 is a wasteful number, since it uses less digits than its factorization.

643324343423346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39844193248 (or 39844193242 counting only the distinct ones).

The product of its digits is 107495424, while the sum is 54.

The spelling of 643324343423346 in words is "six hundred forty-three trillion, three hundred twenty-four billion, three hundred forty-three million, four hundred twenty-three thousand, three hundred forty-six".