6555444480 has 288 divisors, whose sum is σ = 25053880320. Its totient is φ = 1613537280.

The previous prime is 6555444463. The next prime is 6555444503. The reversal of 6555444480 is 844445556.

It is a happy number.

6555444480 is a `hidden beast` number, since 65 + 5 + 544 + 4 + 48 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

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 31 ways as a sum of consecutive naturals, for example, 441985 + ... + 456575.

It is an arithmetic number, because the mean of its divisors is an integer number (86992640).

Almost surely, 2^6555444480 is an apocalyptic number.

6555444480 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 6555444480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12526940160).

6555444480 is an abundant number, since it is smaller than the sum of its proper divisors (18498435840).

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

6555444480 is a wasteful number, since it uses less digits than its factorization.

6555444480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14634 (or 14614 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 45.

The square root of 6555444480 is about 80965.6994041304. The cubic root of 6555444480 is about 1871.5468988867.

The spelling of 6555444480 in words is "six billion, five hundred fifty-five million, four hundred forty-four thousand, four hundred eighty".