6438818889395 has 16 divisors (see below), whose sum is σ = 8486864259840. Its totient is φ = 4667775339744.

The previous prime is 6438818889359. The next prime is 6438818889407. The reversal of 6438818889395 is 5939888188346.

6438818889395 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6438818889395 - 2¹² = 6438818885299 is a prime.

It is a super-2 number, since 2×6438818889395² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1473411749 + ... + 1473416118.

It is an arithmetic number, because the mean of its divisors is an integer number (530429016240).

Almost surely, 2^{6438818889395} is an apocalyptic number.

6438818889395 is a deficient number, since it is larger than the sum of its proper divisors (2048045370445).

6438818889395 is a wasteful number, since it uses less digits than its factorization.

6438818889395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946827914.

The product of its digits is 2866544640, while the sum is 80.

The spelling of 6438818889395 in words is "six trillion, four hundred thirty-eight billion, eight hundred eighteen million, eight hundred eighty-nine thousand, three hundred ninety-five".