6543331106400 has 864 divisors, whose sum is σ = 26304186924288. Its totient is φ = 1515054182400.

The previous prime is 6543331106369. The next prime is 6543331106401. The reversal of 6543331106400 is 46011333456.

6543331106400 is a `hidden beast` number, since 6 + 5 + 4 + 3 + 3 + 3 + 1 + 1 + 0 + 640 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543331106401) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1451812947 + ... + 1451817453.

It is an arithmetic number, because the mean of its divisors is an integer number (30444660792).

Almost surely, 2^{6543331106400} is an apocalyptic number.

6543331106400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6543331106400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13152093462144).

6543331106400 is an abundant number, since it is smaller than the sum of its proper divisors (19760855817888).

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

6543331106400 is a wasteful number, since it uses less digits than its factorization.

6543331106400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5364 (or 5348 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 6543331106400 its reverse (46011333456), we get a palindrome (6589342439856).

The spelling of 6543331106400 in words is "six trillion, five hundred forty-three billion, three hundred thirty-one million, one hundred six thousand, four hundred".