655555055 has 4 divisors (see below), whose sum is σ = 786666072. Its totient is φ = 524444040.

The previous prime is 655555051. The next prime is 655555091. The reversal of 655555055 is 550555556.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 655555055 - 2² = 655555051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655555051) 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, 65555501 + ... + 65555510.

It is an arithmetic number, because the mean of its divisors is an integer number (196666518).

Almost surely, 2^655555055 is an apocalyptic number.

655555055 is a deficient number, since it is larger than the sum of its proper divisors (131111017).

655555055 is a wasteful number, since it uses less digits than its factorization.

655555055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131111016.

The product of its (nonzero) digits is 468750, while the sum is 41.

The square root of 655555055 is about 25603.8093845428. The cubic root of 655555055 is about 868.6998040111.

The spelling of 655555055 in words is "six hundred fifty-five million, five hundred fifty-five thousand, fifty-five".