655525556 has 12 divisors (see below), whose sum is σ = 1311051168. Its totient is φ = 280939512.

The previous prime is 655525523. The next prime is 655525567.

It is a happy number.

655525556 is nontrivially palindromic in base 10.

655525556 is an admirable number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 11705786 + ... + 11705841.

It is an arithmetic number, because the mean of its divisors is an integer number (109254264).

Almost surely, 2^655525556 is an apocalyptic number.

It is an amenable number.

655525556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

655525556 is a wasteful number, since it uses less digits than its factorization.

655525556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23411638 (or 23411636 counting only the distinct ones).

The product of its digits is 1125000, while the sum is 44.

The square root of 655525556 is about 25603.2333114394. The cubic root of 655525556 is about 868.6867737503.

The spelling of 655525556 in words is "six hundred fifty-five million, five hundred twenty-five thousand, five hundred fifty-six".