643310534341 has 4 divisors (see below), whose sum is σ = 643331224800. Its totient is φ = 643289843884.

The previous prime is 643310534333. The next prime is 643310534381. The reversal of 643310534341 is 143435013346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 643310534341 - 2³ = 643310534333 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 643310534341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643310534381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10298521 + ... + 10360798.

It is an arithmetic number, because the mean of its divisors is an integer number (160832806200).

Almost surely, 2^643310534341 is an apocalyptic number.

It is an amenable number.

643310534341 is a deficient number, since it is larger than the sum of its proper divisors (20690459).

643310534341 is a wasteful number, since it uses less digits than its factorization.

643310534341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20690458.

The product of its (nonzero) digits is 155520, while the sum is 37.

Adding to 643310534341 its reverse (143435013346), we get a palindrome (786745547687).

The spelling of 643310534341 in words is "six hundred forty-three billion, three hundred ten million, five hundred thirty-four thousand, three hundred forty-one".