655515606 has 32 divisors (see below), whose sum is σ = 1369313280. Its totient is φ = 208992096.

The previous prime is 655515593. The next prime is 655515611. The reversal of 655515606 is 606515556.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 11926 + ... + 38121.

It is an arithmetic number, because the mean of its divisors is an integer number (42791040).

Almost surely, 2^655515606 is an apocalyptic number.

655515606 is an abundant number, since it is smaller than the sum of its proper divisors (713797674).

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

655515606 is a wasteful number, since it uses less digits than its factorization.

655515606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50148.

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 655515606 is about 25603.0389993063. The cubic root of 655515606 is about 868.6823785608.

Subtracting from 655515606 its reverse (606515556), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 655515606 in words is "six hundred fifty-five million, five hundred fifteen thousand, six hundred six".