205541100013555 has 32 divisors (see below), whose sum is σ = 251700490117440. Its totient is φ = 161098889656320.

The previous prime is 205541100013553. The next prime is 205541100013577. The reversal of 205541100013555 is 555310001145502.

It is not a de Polignac number, because 205541100013555 - 2¹ = 205541100013553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205541100013553) 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 31 ways as a sum of consecutive naturals, for example, 32749785 + ... + 38517925.

It is an arithmetic number, because the mean of its divisors is an integer number (7865640316170).

Almost surely, 2^{205541100013555} is an apocalyptic number.

205541100013555 is a deficient number, since it is larger than the sum of its proper divisors (46159390103885).

205541100013555 is a wasteful number, since it uses less digits than its factorization.

205541100013555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5768871.

The product of its (nonzero) digits is 75000, while the sum is 37.

The spelling of 205541100013555 in words is "two hundred five trillion, five hundred forty-one billion, one hundred million, thirteen thousand, five hundred fifty-five".