655809544 has 64 divisors (see below), whose sum is σ = 1426118400. Its totient is φ = 280003584.

The previous prime is 655809523. The next prime is 655809559. The reversal of 655809544 is 445908556.

It is a junction number, because it is equal to n+sod(n) for n = 655809494 and 655809503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101169 + ... + 107455.

It is an arithmetic number, because the mean of its divisors is an integer number (22283100).

Almost surely, 2^655809544 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 655809544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (713059200).

655809544 is an abundant number, since it is smaller than the sum of its proper divisors (770308856).

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

655809544 is a wasteful number, since it uses less digits than its factorization.

655809544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6382 (or 6378 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 46.

The square root of 655809544 is about 25608.7786510798. The cubic root of 655809544 is about 868.8122003392.

The spelling of 655809544 in words is "six hundred fifty-five million, eight hundred nine thousand, five hundred forty-four".