205235122554105 has 128 divisors (see below), whose sum is σ = 395409749299200. Its totient is φ = 88950388515840.

The previous prime is 205235122554103. The next prime is 205235122554193. The reversal of 205235122554105 is 501455221532502.

It is not a de Polignac number, because 205235122554105 - 2¹ = 205235122554103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205235122554103) 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 127 ways as a sum of consecutive naturals, for example, 21310546 + ... + 29404244.

It is an arithmetic number, because the mean of its divisors is an integer number (3089138666400).

Almost surely, 2^{205235122554105} is an apocalyptic number.

It is an amenable number.

205235122554105 is a deficient number, since it is larger than the sum of its proper divisors (190174626745095).

205235122554105 is a wasteful number, since it uses less digits than its factorization.

205235122554105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093919.

The product of its (nonzero) digits is 600000, while the sum is 42.

The spelling of 205235122554105 in words is "two hundred five trillion, two hundred thirty-five billion, one hundred twenty-two million, five hundred fifty-four thousand, one hundred five".