643235411313 has 24 divisors (see below), whose sum is σ = 1030762455840. Its totient is φ = 383232188160.

The previous prime is 643235411297. The next prime is 643235411341. The reversal of 643235411313 is 313114532346.

643235411313 is a `hidden beast` number, since 6 + 4 + 3 + 235 + 411 + 3 + 1 + 3 = 666.

It is not a de Polignac number, because 643235411313 - 2⁴ = 643235411297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (643235411353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55056256 + ... + 55067937.

It is an arithmetic number, because the mean of its divisors is an integer number (42948435660).

Almost surely, 2^643235411313 is an apocalyptic number.

It is an amenable number.

643235411313 is a deficient number, since it is larger than the sum of its proper divisors (387527044527).

643235411313 is a wasteful number, since it uses less digits than its factorization.

643235411313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110124269 (or 110124266 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

Adding to 643235411313 its reverse (313114532346), we get a palindrome (956349943659).

The spelling of 643235411313 in words is "six hundred forty-three billion, two hundred thirty-five million, four hundred eleven thousand, three hundred thirteen".