6649939200 has 216 divisors, whose sum is σ = 23102514400. Its totient is φ = 1679892480.

The previous prime is 6649939189. The next prime is 6649939213. The reversal of 6649939200 is 29399466.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 6649939200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355686 + ... + 373914.

Almost surely, 2^6649939200 is an apocalyptic number.

6649939200 is a gapful number since it is divisible by the number (60) 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 6649939200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11551257200).

6649939200 is an abundant number, since it is smaller than the sum of its proper divisors (16452575200).

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

6649939200 is a wasteful number, since it uses less digits than its factorization.

6649939200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18277 (or 18258 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 48.

The square root of 6649939200 is about 81547.1593619300. The cubic root of 6649939200 is about 1880.4966244955.

The spelling of 6649939200 in words is "six billion, six hundred forty-nine million, nine hundred thirty-nine thousand, two hundred".