655565610 has 64 divisors (see below), whose sum is σ = 1834848000. Its totient is φ = 149841216.

The previous prime is 655565591. The next prime is 655565629. The reversal of 655565610 is 16565556.

It is an interprime number because it is at equal distance from previous prime (655565591) and next prime (655565629).

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 21565 + ... + 42144.

It is an arithmetic number, because the mean of its divisors is an integer number (28669500).

Almost surely, 2^655565610 is an apocalyptic number.

655565610 is an abundant number, since it is smaller than the sum of its proper divisors (1179282390).

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

655565610 is a wasteful number, since it uses less digits than its factorization.

655565610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63740 (or 63726 counting only the distinct ones).

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

The square root of 655565610 is about 25604.0155053851. The cubic root of 655565610 is about 868.7044662573.

The spelling of 655565610 in words is "six hundred fifty-five million, five hundred sixty-five thousand, six hundred ten".