205102305155 has 16 divisors (see below), whose sum is σ = 268549267968. Its totient is φ = 149136588000.

The previous prime is 205102305139. The next prime is 205102305179. The reversal of 205102305155 is 551503201502.

205102305155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205102305155 - 2⁴ = 205102305139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 68741 + ... + 644150.

It is an arithmetic number, because the mean of its divisors is an integer number (16784329248).

Almost surely, 2^205102305155 is an apocalyptic number.

205102305155 is a deficient number, since it is larger than the sum of its proper divisors (63446962813).

205102305155 is a wasteful number, since it uses less digits than its factorization.

205102305155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718138.

The product of its (nonzero) digits is 7500, while the sum is 29.

Adding to 205102305155 its reverse (551503201502), we get a palindrome (756605506657).

The spelling of 205102305155 in words is "two hundred five billion, one hundred two million, three hundred five thousand, one hundred fifty-five".