655564800 has 336 divisors, whose sum is σ = 2389034592. Its totient is φ = 157286400.

The previous prime is 655564769. The next prime is 655564801. The reversal of 655564800 is 8465556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655564801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6758352 + ... + 6758448.

It is an arithmetic number, because the mean of its divisors is an integer number (7110222).

Almost surely, 2^655564800 is an apocalyptic number.

655564800 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 655564800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1194517296).

655564800 is an abundant number, since it is smaller than the sum of its proper divisors (1733469792).

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

655564800 is a wasteful number, since it uses less digits than its factorization.

655564800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 655564800 is about 25603.9996875488. Note that the first 3 decimals coincide. The cubic root of 655564800 is about 868.7041084742.

The spelling of 655564800 in words is "six hundred fifty-five million, five hundred sixty-four thousand, eight hundred".