205503355055 has 8 divisors (see below), whose sum is σ = 246606543792. Its totient is φ = 164401005568.

The previous prime is 205503355051. The next prime is 205503355061. The reversal of 205503355055 is 550553305502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205503355055 - 2² = 205503355051 is a prime.

It is a super-2 number, since 2×205503355055² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205503355051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646964 + ... + 910806.

It is an arithmetic number, because the mean of its divisors is an integer number (30825817974).

Almost surely, 2^205503355055 is an apocalyptic number.

205503355055 is a deficient number, since it is larger than the sum of its proper divisors (41103188737).

205503355055 is a wasteful number, since it uses less digits than its factorization.

205503355055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419625.

The product of its (nonzero) digits is 281250, while the sum is 38.

The spelling of 205503355055 in words is "two hundred five billion, five hundred three million, three hundred fifty-five thousand, fifty-five".