643140030043 has 4 divisors (see below), whose sum is σ = 735017177200. Its totient is φ = 551262882888.

The previous prime is 643140030037. The next prime is 643140030121. The reversal of 643140030043 is 340030041346.

643140030043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 643140030043 - 2¹³ = 643140021851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 643140029993 and 643140030020.

It is not an unprimeable number, because it can be changed into a prime (643120030043) 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, 45938573568 + ... + 45938573581.

It is an arithmetic number, because the mean of its divisors is an integer number (183754294300).

Almost surely, 2^643140030043 is an apocalyptic number.

643140030043 is a deficient number, since it is larger than the sum of its proper divisors (91877147157).

643140030043 is an equidigital number, since it uses as much as digits as its factorization.

643140030043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91877147156.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 643140030043 its reverse (340030041346), we get a palindrome (983170071389).

The spelling of 643140030043 in words is "six hundred forty-three billion, one hundred forty million, thirty thousand, forty-three".