6543894312 has 256 divisors, whose sum is σ = 20015424000. Its totient is φ = 1974196224.

The previous prime is 6543894299. The next prime is 6543894319. The reversal of 6543894312 is 2134983456.

6543894312 is a `hidden beast` number, since 6 + 543 + 8 + 94 + 3 + 12 = 666.

It is not an unprimeable number, because it can be changed into a prime (6543894319) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7635388 + ... + 7636244.

It is an arithmetic number, because the mean of its divisors is an integer number (78185250).

Almost surely, 2^6543894312 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 6543894312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10007712000).

6543894312 is an abundant number, since it is smaller than the sum of its proper divisors (13471529688).

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

6543894312 is a wasteful number, since it uses less digits than its factorization.

6543894312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977 (or 967 counting only the distinct ones).

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

The square root of 6543894312 is about 80894.3404200813. The cubic root of 6543894312 is about 1870.4470808027.

The spelling of 6543894312 in words is "six billion, five hundred forty-three million, eight hundred ninety-four thousand, three hundred twelve".