643130356013 has 8 divisors (see below), whose sum is σ = 644287869888. Its totient is φ = 641972991744.

The previous prime is 643130355997. The next prime is 643130356019. The reversal of 643130356013 is 310653031346.

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 643130356013 - 2⁴ = 643130355997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643130356019) 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, 12034370 + ... + 12087692.

It is an arithmetic number, because the mean of its divisors is an integer number (80535983736).

Almost surely, 2^643130356013 is an apocalyptic number.

It is an amenable number.

643130356013 is a deficient number, since it is larger than the sum of its proper divisors (1157513875).

643130356013 is a wasteful number, since it uses less digits than its factorization.

643130356013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74803.

The product of its (nonzero) digits is 58320, while the sum is 35.

Adding to 643130356013 its reverse (310653031346), we get a palindrome (953783387359).

The spelling of 643130356013 in words is "six hundred forty-three billion, one hundred thirty million, three hundred fifty-six thousand, thirteen".