655961565289 has 4 divisors (see below), whose sum is σ = 671216485456. Its totient is φ = 640706645124.

The previous prime is 655961565257. The next prime is 655961565319. The reversal of 655961565289 is 982565169556.

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 655961565289 - 2⁵ = 655961565257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655961565239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7627460019 + ... + 7627460104.

It is an arithmetic number, because the mean of its divisors is an integer number (167804121364).

Almost surely, 2^655961565289 is an apocalyptic number.

It is an amenable number.

655961565289 is a deficient number, since it is larger than the sum of its proper divisors (15254920167).

655961565289 is a wasteful number, since it uses less digits than its factorization.

655961565289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15254920166.

The product of its digits is 174960000, while the sum is 67.

The spelling of 655961565289 in words is "six hundred fifty-five billion, nine hundred sixty-one million, five hundred sixty-five thousand, two hundred eighty-nine".