643642114323023 has 4 divisors (see below), whose sum is σ = 643642166038608. Its totient is φ = 643642062607440.

The previous prime is 643642114323011. The next prime is 643642114323031. The reversal of 643642114323023 is 320323411246346.

643642114323023 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 643642114323023 - 2⁴ = 643642114323007 is a prime.

It is a super-2 number, since 2×643642114323023² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643642114323073) 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, 5431403 + ... + 36287523.

It is an arithmetic number, because the mean of its divisors is an integer number (160910541509652).

Almost surely, 2^{643642114323023} is an apocalyptic number.

643642114323023 is a deficient number, since it is larger than the sum of its proper divisors (51715585).

643642114323023 is a wasteful number, since it uses less digits than its factorization.

643642114323023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51715584.

The product of its (nonzero) digits is 1492992, while the sum is 44.

Adding to 643642114323023 its reverse (320323411246346), we get a palindrome (963965525569369).

The spelling of 643642114323023 in words is "six hundred forty-three trillion, six hundred forty-two billion, one hundred fourteen million, three hundred twenty-three thousand, twenty-three".