6649280000 has 200 divisors, whose sum is σ = 18120480840. Its totient is φ = 2416640000.

The previous prime is 6649279991. The next prime is 6649280003. The reversal of 6649280000 is 829466.

It is a tau number, because it is divible by the number of its divisors (200).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649280003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3519056 + ... + 3520944.

Almost surely, 2^6649280000 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 6649280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9060240420).

6649280000 is an abundant number, since it is smaller than the sum of its proper divisors (11471200840).

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

6649280000 is an equidigital number, since it uses as much as digits as its factorization.

6649280000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 6649280000 is about 81543.1174287567. The cubic root of 6649280000 is about 1880.4344853641.

The spelling of 6649280000 in words is "six billion, six hundred forty-nine million, two hundred eighty thousand".