655989556 has 12 divisors (see below), whose sum is σ = 1148301280. Its totient is φ = 327903480.

The previous prime is 655989479. The next prime is 655989559.

655989556 is nontrivially palindromic in base 10.

655989556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×655989556³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 655989556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655989559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5136 + ... + 36583.

Almost surely, 2^655989556 is an apocalyptic number.

It is an amenable number.

655989556 is a deficient number, since it is larger than the sum of its proper divisors (492311724).

655989556 is a wasteful number, since it uses less digits than its factorization.

655989556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45654 (or 45652 counting only the distinct ones).

The product of its digits is 14580000, while the sum is 58.

The square root of 655989556 is about 25612.2930640737. The cubic root of 655989556 is about 868.8916859743.

The spelling of 655989556 in words is "six hundred fifty-five million, nine hundred eighty-nine thousand, five hundred fifty-six".