643310346023 has 4 divisors (see below), whose sum is σ = 651453515040. Its totient is φ = 635167177008.

The previous prime is 643310346017. The next prime is 643310346053. The reversal of 643310346023 is 320643013346.

643310346023 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 643310346023 - 2²⁶ = 643243237159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643310346053) 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, 4071584390 + ... + 4071584547.

It is an arithmetic number, because the mean of its divisors is an integer number (162863378760).

Almost surely, 2^643310346023 is an apocalyptic number.

643310346023 is a deficient number, since it is larger than the sum of its proper divisors (8143169017).

643310346023 is an equidigital number, since it uses as much as digits as its factorization.

643310346023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8143169016.

The product of its (nonzero) digits is 93312, while the sum is 35.

Adding to 643310346023 its reverse (320643013346), we get a palindrome (963953359369).

The spelling of 643310346023 in words is "six hundred forty-three billion, three hundred ten million, three hundred forty-six thousand, twenty-three".