655684623 has 24 divisors (see below), whose sum is σ = 1087582080. Its totient is φ = 376468560.

The previous prime is 655684619. The next prime is 655684633. The reversal of 655684623 is 326486556.

655684623 is a `hidden beast` number, since 65 + 568 + 4 + 6 + 23 = 666.

655684623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 655684623 - 2² = 655684619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655684633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172411 + ... + 176172.

It is an arithmetic number, because the mean of its divisors is an integer number (45315920).

Almost surely, 2^655684623 is an apocalyptic number.

655684623 is a deficient number, since it is larger than the sum of its proper divisors (431897457).

655684623 is a wasteful number, since it uses less digits than its factorization.

655684623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348619 (or 348616 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 655684623 is about 25606.3395080203. The cubic root of 655684623 is about 868.7570319946.

The spelling of 655684623 in words is "six hundred fifty-five million, six hundred eighty-four thousand, six hundred twenty-three".