643053108535 has 8 divisors (see below), whose sum is σ = 771669273456. Its totient is φ = 514438791360.

The previous prime is 643053108431. The next prime is 643053108539. The reversal of 643053108535 is 535801350346.

It is a happy number.

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

It is not a de Polignac number, because 643053108535 - 2³⁵ = 608693370167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 643053108491 and 643053108500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643053108539) 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, 477340 + ... + 1230430.

It is an arithmetic number, because the mean of its divisors is an integer number (96458659182).

Almost surely, 2^643053108535 is an apocalyptic number.

643053108535 is a deficient number, since it is larger than the sum of its proper divisors (128616164921).

643053108535 is a wasteful number, since it uses less digits than its factorization.

643053108535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923873.

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 643053108535 in words is "six hundred forty-three billion, fifty-three million, one hundred eight thousand, five hundred thirty-five".