643458854346 has 96 divisors (see below), whose sum is σ = 1649290403520. Its totient is φ = 165477312000.

The previous prime is 643458854309. The next prime is 643458854377.

643458854346 is nontrivially palindromic in base 10.

643458854346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 643458854346.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 658351 + ... + 1311618.

It is an arithmetic number, because the mean of its divisors is an integer number (17180108370).

Almost surely, 2^643458854346 is an apocalyptic number.

643458854346 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

643458854346 is an abundant number, since it is smaller than the sum of its proper divisors (1005831549174).

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

643458854346 is a wasteful number, since it uses less digits than its factorization.

643458854346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970100 (or 1970093 counting only the distinct ones).

The product of its digits is 132710400, while the sum is 60.

The spelling of 643458854346 in words is "six hundred forty-three billion, four hundred fifty-eight million, eight hundred fifty-four thousand, three hundred forty-six".