6438405175489 has 8 divisors (see below), whose sum is σ = 7358777961920. Its totient is φ = 5518182543696.

The previous prime is 6438405175487. The next prime is 6438405175537. The reversal of 6438405175489 is 9845715048346.

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 6438405175489 - 2¹ = 6438405175487 is a prime.

It is a super-2 number, since 2×6438405175489² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6438405175489.

It is not an unprimeable number, because it can be changed into a prime (6438405175487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37446759 + ... + 37618300.

It is an arithmetic number, because the mean of its divisors is an integer number (919847245240).

Almost surely, 2^{6438405175489} is an apocalyptic number.

It is an amenable number.

6438405175489 is a deficient number, since it is larger than the sum of its proper divisors (920372786431).

6438405175489 is a wasteful number, since it uses less digits than its factorization.

6438405175489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75077319.

The product of its (nonzero) digits is 116121600, while the sum is 64.

The spelling of 6438405175489 in words is "six trillion, four hundred thirty-eight billion, four hundred five million, one hundred seventy-five thousand, four hundred eighty-nine".