655781748 has 12 divisors (see below), whose sum is σ = 1530157440. Its totient is φ = 218593912.

The previous prime is 655781743. The next prime is 655781801. The reversal of 655781748 is 847187556.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 655781748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655781743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27324228 + ... + 27324251.

It is an arithmetic number, because the mean of its divisors is an integer number (127513120).

Almost surely, 2^655781748 is an apocalyptic number.

It is an amenable number.

655781748 is an abundant number, since it is smaller than the sum of its proper divisors (874375692).

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

655781748 is a wasteful number, since it uses less digits than its factorization.

655781748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54648486 (or 54648484 counting only the distinct ones).

The product of its digits is 1881600, while the sum is 51.

The square root of 655781748 is about 25608.2359408062. The cubic root of 655781748 is about 868.7999255127.

The spelling of 655781748 in words is "six hundred fifty-five million, seven hundred eighty-one thousand, seven hundred forty-eight".