6533421440 has 128 divisors (see below), whose sum is σ = 19223507520. Its totient is φ = 2067701760.

The previous prime is 6533421437. The next prime is 6533421467. The reversal of 6533421440 is 441243356.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 6533421397 and 6533421406.

It is a congruent number.

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, 2150 + ... + 114330.

Almost surely, 2^6533421440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6533421440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9611753760).

6533421440 is an abundant number, since it is smaller than the sum of its proper divisors (12690086080).

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

6533421440 is a wasteful number, since it uses less digits than its factorization.

6533421440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112220 (or 112208 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 6533421440 is about 80829.5827033642. The cubic root of 6533421440 is about 1869.4487246097.

Adding to 6533421440 its reverse (441243356), we get a palindrome (6974664796).

The spelling of 6533421440 in words is "six billion, five hundred thirty-three million, four hundred twenty-one thousand, four hundred forty".