643503103313 has 8 divisors (see below), whose sum is σ = 759155735040. Its totient is φ = 533781375840.

The previous prime is 643503103301. The next prime is 643503103343. The reversal of 643503103313 is 313301305346.

643503103313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 643503103313 - 2⁴ = 643503103297 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 643503103313.

It is not an unprimeable number, because it can be changed into a prime (643503103343) 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, 1482725828 + ... + 1482726261.

It is an arithmetic number, because the mean of its divisors is an integer number (94894466880).

Almost surely, 2^643503103313 is an apocalyptic number.

It is an amenable number.

643503103313 is a deficient number, since it is larger than the sum of its proper divisors (115652631727).

643503103313 is a wasteful number, since it uses less digits than its factorization.

643503103313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2965452127.

The product of its (nonzero) digits is 29160, while the sum is 32.

Adding to 643503103313 its reverse (313301305346), we get a palindrome (956804408659).

The spelling of 643503103313 in words is "six hundred forty-three billion, five hundred three million, one hundred three thousand, three hundred thirteen".