6428543968 has 96 divisors (see below), whose sum is σ = 15803520768. Its totient is φ = 2500761600.

The previous prime is 6428543951. The next prime is 6428544011. The reversal of 6428543968 is 8693458246.

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, 1996696 + ... + 1999912.

It is an arithmetic number, because the mean of its divisors is an integer number (164620008).

Almost surely, 2^6428543968 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 6428543968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7901760384).

6428543968 is an abundant number, since it is smaller than the sum of its proper divisors (9374976800).

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

6428543968 is a wasteful number, since it uses less digits than its factorization.

6428543968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4056 (or 4048 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 55.

The square root of 6428543968 is about 80178.2013267946. The cubic root of 6428543968 is about 1859.3916351624.

The spelling of 6428543968 in words is "six billion, four hundred twenty-eight million, five hundred forty-three thousand, nine hundred sixty-eight".