655596609 has 4 divisors (see below), whose sum is σ = 874128816. Its totient is φ = 437064404.

The previous prime is 655596593. The next prime is 655596637. The reversal of 655596609 is 906695556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 655596609 - 2⁴ = 655596593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (655596659) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 109266099 + ... + 109266104.

It is an arithmetic number, because the mean of its divisors is an integer number (218532204).

Almost surely, 2^655596609 is an apocalyptic number.

It is an amenable number.

655596609 is a deficient number, since it is larger than the sum of its proper divisors (218532207).

655596609 is a wasteful number, since it uses less digits than its factorization.

655596609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218532206.

The product of its (nonzero) digits is 2187000, while the sum is 51.

The square root of 655596609 is about 25604.6208524946. The cubic root of 655596609 is about 868.7181585279.

The spelling of 655596609 in words is "six hundred fifty-five million, five hundred ninety-six thousand, six hundred nine".