6531894432 has 576 divisors, whose sum is σ = 23482368000. Its totient is φ = 1783192320.

The previous prime is 6531894389. The next prime is 6531894443. The reversal of 6531894432 is 2344981356.

6531894432 is a `hidden beast` number, since 6 + 531 + 89 + 4 + 4 + 32 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 82682169 + ... + 82682247.

It is an arithmetic number, because the mean of its divisors is an integer number (40768000).

Almost surely, 2^6531894432 is an apocalyptic number.

6531894432 is a gapful number since it is divisible by the number (62) 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 6531894432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11741184000).

6531894432 is an abundant number, since it is smaller than the sum of its proper divisors (16950473568).

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

6531894432 is an equidigital number, since it uses as much as digits as its factorization.

6531894432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 122 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 6531894432 is about 80820.1363027804. The cubic root of 6531894432 is about 1869.3030691461.

The spelling of 6531894432 in words is "six billion, five hundred thirty-one million, eight hundred ninety-four thousand, four hundred thirty-two".