6649724928 has 360 divisors, whose sum is σ = 22591929024. Its totient is φ = 1720320000.

The previous prime is 6649724909. The next prime is 6649724957. The reversal of 6649724928 is 8294279466.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26492803 + ... + 26493053.

Almost surely, 2^6649724928 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 6649724928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11295964512).

6649724928 is an abundant number, since it is smaller than the sum of its proper divisors (15942204096).

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

6649724928 is a wasteful number, since it uses less digits than its factorization.

6649724928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 274 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 57.

The square root of 6649724928 is about 81545.8455594152. The cubic root of 6649724928 is about 1880.4764267118.

The spelling of 6649724928 in words is "six billion, six hundred forty-nine million, seven hundred twenty-four thousand, nine hundred twenty-eight".