6438933853 has 8 divisors (see below), whose sum is σ = 7025462496. Its totient is φ = 5852600400.

The previous prime is 6438933827. The next prime is 6438933857. The reversal of 6438933853 is 3583398346.

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 6438933853 - 2⁹ = 6438933341 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 6438933853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438933857) 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, 25050 + ... + 116212.

It is an arithmetic number, because the mean of its divisors is an integer number (878182812).

Almost surely, 2^6438933853 is an apocalyptic number.

It is an amenable number.

6438933853 is a deficient number, since it is larger than the sum of its proper divisors (586528643).

6438933853 is a wasteful number, since it uses less digits than its factorization.

6438933853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97595.

The product of its digits is 5598720, while the sum is 52.

The square root of 6438933853 is about 80242.9676233376. The cubic root of 6438933853 is about 1860.3928191994.

It can be divided in two parts, 643893 and 3853, that added together give a palindrome (647746).

The spelling of 6438933853 in words is "six billion, four hundred thirty-eight million, nine hundred thirty-three thousand, eight hundred fifty-three".