205061111061 has 16 divisors (see below), whose sum is σ = 279247544064. Its totient is φ = 133791363584.

The previous prime is 205061111011. The next prime is 205061111089. The reversal of 205061111061 is 160111160502.

It is a cyclic number.

It is not a de Polignac number, because 205061111061 - 2¹¹ = 205061109013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205061111011) 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, 3884701 + ... + 3937133.

It is an arithmetic number, because the mean of its divisors is an integer number (17452971504).

Almost surely, 2^205061111061 is an apocalyptic number.

It is an amenable number.

205061111061 is a deficient number, since it is larger than the sum of its proper divisors (74186433003).

205061111061 is a wasteful number, since it uses less digits than its factorization.

205061111061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80220.

The product of its (nonzero) digits is 360, while the sum is 24.

Adding to 205061111061 its reverse (160111160502), we get a palindrome (365172271563).

The spelling of 205061111061 in words is "two hundred five billion, sixty-one million, one hundred eleven thousand, sixty-one".