6545664000 has 384 divisors, whose sum is σ = 24224054400. Its totient is φ = 1743667200.

The previous prime is 6545663983. The next prime is 6545664011. The reversal of 6545664000 is 4665456.

It is a happy number.

6545664000 is a `hidden beast` number, since 6 + 5 + 4 + 5 + 6 + 640 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 31 ways as a sum of consecutive naturals, for example, 6911527 + ... + 6912473.

It is an arithmetic number, because the mean of its divisors is an integer number (63083475).

Almost surely, 2^6545664000 is an apocalyptic number.

6545664000 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 6545664000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12112027200).

6545664000 is an abundant number, since it is smaller than the sum of its proper divisors (17678390400).

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

6545664000 is an equidigital number, since it uses as much as digits as its factorization.

6545664000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 6545664000 is about 80905.2779489694. The cubic root of 6545664000 is about 1870.6156760995.

The spelling of 6545664000 in words is "six billion, five hundred forty-five million, six hundred sixty-four thousand".