6438237252864 has 108 divisors (see below), whose sum is σ = 18084413997216. Its totient is φ = 2033127465984.

The previous prime is 6438237252847. The next prime is 6438237252893. The reversal of 6438237252864 is 4682527328346.

It is a junction number, because it is equal to n+sod(n) for n = 6438237252798 and 6438237252807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11333724 + ... + 11888219.

It is an arithmetic number, because the mean of its divisors is an integer number (167448277752).

Almost surely, 2^{6438237252864} is an apocalyptic number.

6438237252864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6438237252864 is an abundant number, since it is smaller than the sum of its proper divisors (11646176744352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6438237252864 is a wasteful number, since it uses less digits than its factorization.

6438237252864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23222000 (or 23221967 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 60.

The spelling of 6438237252864 in words is "six trillion, four hundred thirty-eight billion, two hundred thirty-seven million, two hundred fifty-two thousand, eight hundred sixty-four".