6649219584 has 160 divisors (see below), whose sum is σ = 22494215040. Its totient is φ = 1899749376.

The previous prime is 6649219541. The next prime is 6649219597. The reversal of 6649219584 is 4859129466.

6649219584 is a `hidden beast` number, since 6 + 6 + 49 + 2 + 19 + 584 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 6649219584.

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, 62412 + ... + 131124.

It is an arithmetic number, because the mean of its divisors is an integer number (140588844).

Almost surely, 2^6649219584 is an apocalyptic number.

6649219584 is a gapful number since it is divisible by the number (64) 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 6649219584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11247107520).

6649219584 is an abundant number, since it is smaller than the sum of its proper divisors (15844995456).

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

6649219584 is an equidigital number, since it uses as much as digits as its factorization.

6649219584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68747 (or 68725 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 6649219584 is about 81542.7469735966. The cubic root of 6649219584 is about 1880.4287900771.

The spelling of 6649219584 in words is "six billion, six hundred forty-nine million, two hundred nineteen thousand, five hundred eighty-four".