6438063887 has 8 divisors (see below), whose sum is σ = 6684832800. Its totient is φ = 6192946144.

The previous prime is 6438063881. The next prime is 6438063913. The reversal of 6438063887 is 7883608346.

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 6438063887 - 2¹² = 6438059791 is a prime.

It is a super-2 number, since 2×6438063887² = 82897333226187097538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438063881) 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, 404843 + ... + 420444.

It is an arithmetic number, because the mean of its divisors is an integer number (835604100).

Almost surely, 2^6438063887 is an apocalyptic number.

6438063887 is a deficient number, since it is larger than the sum of its proper divisors (246768913).

6438063887 is a wasteful number, since it uses less digits than its factorization.

6438063887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825585.

The product of its (nonzero) digits is 4644864, while the sum is 53.

The square root of 6438063887 is about 80237.5466162818. The cubic root of 6438063887 is about 1860.3090293758.

The spelling of 6438063887 in words is "six billion, four hundred thirty-eight million, sixty-three thousand, eight hundred eighty-seven".