643310534343 has 32 divisors (see below), whose sum is σ = 880728076800. Its totient is φ = 417454240896.

The previous prime is 643310534333. The next prime is 643310534381. The reversal of 643310534343 is 343435013346.

It is not a de Polignac number, because 643310534343 - 2¹⁰ = 643310533319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643310534323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64076118 + ... + 64086156.

It is an arithmetic number, because the mean of its divisors is an integer number (27522752400).

Almost surely, 2^643310534343 is an apocalyptic number.

643310534343 is a deficient number, since it is larger than the sum of its proper divisors (237417542457).

643310534343 is a wasteful number, since it uses less digits than its factorization.

643310534343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11751.

The product of its (nonzero) digits is 466560, while the sum is 39.

Adding to 643310534343 its reverse (343435013346), we get a palindrome (986745547689).

The spelling of 643310534343 in words is "six hundred forty-three billion, three hundred ten million, five hundred thirty-four thousand, three hundred forty-three".