655605616 has 20 divisors (see below), whose sum is σ = 1325464272. Its totient is φ = 313550336.

The previous prime is 655605607. The next prime is 655605631. The reversal of 655605616 is 616506556.

It is a congruent number.

It is an unprimeable number.

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, 890401 + ... + 891136.

Almost surely, 2^655605616 is an apocalyptic number.

It is an amenable number.

655605616 is an abundant number, since it is smaller than the sum of its proper divisors (669858656).

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

655605616 is a wasteful number, since it uses less digits than its factorization.

655605616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781568 (or 1781562 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 655605616 is about 25604.7967381114. The cubic root of 655605616 is about 868.7221368425.

The spelling of 655605616 in words is "six hundred fifty-five million, six hundred five thousand, six hundred sixteen".