643328140303 has 8 divisors (see below), whose sum is σ = 647012724480. Its totient is φ = 639644562840.

The previous prime is 643328140283. The next prime is 643328140321. The reversal of 643328140303 is 303041823346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 643328140303 - 2²⁹ = 642791269391 is a prime.

It is a super-2 number, since 2×643328140303² (a number of 24 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 (643328140703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1049248 + ... + 1545178.

It is an arithmetic number, because the mean of its divisors is an integer number (80876590560).

Almost surely, 2^643328140303 is an apocalyptic number.

643328140303 is a deficient number, since it is larger than the sum of its proper divisors (3684584177).

643328140303 is a wasteful number, since it uses less digits than its factorization.

643328140303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503357.

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 643328140303 its reverse (303041823346), we get a palindrome (946369963649).

The spelling of 643328140303 in words is "six hundred forty-three billion, three hundred twenty-eight million, one hundred forty thousand, three hundred three".