205505560555057 has 16 divisors (see below), whose sum is σ = 245472158460672. Its totient is φ = 168215953086720.

The previous prime is 205505560554997. The next prime is 205505560555073. The reversal of 205505560555057 is 750555065505502.

It is not a de Polignac number, because 205505560555057 - 2⁷ = 205505560554929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205505560554989 and 205505560555007.

It is not an unprimeable number, because it can be changed into a prime (205505560555357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1034286444 + ... + 1034485117.

It is an arithmetic number, because the mean of its divisors is an integer number (15342009903792).

Almost surely, 2^{205505560555057} is an apocalyptic number.

It is an amenable number.

205505560555057 is a deficient number, since it is larger than the sum of its proper divisors (39966597905615).

205505560555057 is a wasteful number, since it uses less digits than its factorization.

205505560555057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068772208.

The product of its (nonzero) digits is 32812500, while the sum is 55.

The spelling of 205505560555057 in words is "two hundred five trillion, five hundred five billion, five hundred sixty million, five hundred fifty-five thousand, fifty-seven".