643310534344 has 16 divisors (see below), whose sum is σ = 1269691844400. Its totient is φ = 304726042512.

The previous prime is 643310534333. The next prime is 643310534381. The reversal of 643310534344 is 443435013346.

643310534344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 643310534297 and 643310534306.

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, 2116152922 + ... + 2116153225.

It is an arithmetic number, because the mean of its divisors is an integer number (79355740275).

Almost surely, 2^643310534344 is an apocalyptic number.

It is an amenable number.

643310534344 is a deficient number, since it is larger than the sum of its proper divisors (626381310056).

643310534344 is a wasteful number, since it uses less digits than its factorization.

643310534344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4232306172 (or 4232306168 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 40.

The spelling of 643310534344 in words is "six hundred forty-three billion, three hundred ten million, five hundred thirty-four thousand, three hundred forty-four".