6649452720000 has 480 divisors, whose sum is σ = 24950109721680. Its totient is φ = 1696088064000.

The previous prime is 6649452719983. The next prime is 6649452720041. The reversal of 6649452720000 is 272549466.

6649452720000 is a `hidden beast` number, since 66 + 49 + 4 + 527 + 20 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 16359232 + ... + 16760768.

Almost surely, 2^{6649452720000} is an apocalyptic number.

6649452720000 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 6649452720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12475054860840).

6649452720000 is an abundant number, since it is smaller than the sum of its proper divisors (18300657001680).

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

6649452720000 is a wasteful number, since it uses less digits than its factorization.

6649452720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401600 (or 401570 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 6649452720000 in words is "six trillion, six hundred forty-nine billion, four hundred fifty-two million, seven hundred twenty thousand".