6619451328 has 448 divisors, whose sum is σ = 23304601600. Its totient is φ = 1802787840.

The previous prime is 6619451309. The next prime is 6619451387. The reversal of 6619451328 is 8231549166.

6619451328 is a `hidden beast` number, since 6 + 619 + 4 + 5 + 1 + 3 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47621883 + ... + 47622021.

It is an arithmetic number, because the mean of its divisors is an integer number (52019200).

Almost surely, 2^6619451328 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 6619451328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11652300800).

6619451328 is an abundant number, since it is smaller than the sum of its proper divisors (16685150272).

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

6619451328 is a wasteful number, since it uses less digits than its factorization.

6619451328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 309 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 6619451328 is about 81360.0106194683. The cubic root of 6619451328 is about 1877.6183936125.

The spelling of 6619451328 in words is "six billion, six hundred nineteen million, four hundred fifty-one thousand, three hundred twenty-eight".