205711675755545 has 16 divisors (see below), whose sum is σ = 258465929847552. Its totient is φ = 156876902191680.

The previous prime is 205711675755541. The next prime is 205711675755557. The reversal of 205711675755545 is 545557576117502.

It is not a de Polignac number, because 205711675755545 - 2² = 205711675755541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205711675755541) 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, 3052521221 + ... + 3052588610.

It is an arithmetic number, because the mean of its divisors is an integer number (16154120615472).

Almost surely, 2^{205711675755545} is an apocalyptic number.

It is an amenable number.

205711675755545 is a deficient number, since it is larger than the sum of its proper divisors (52754254092007).

205711675755545 is a wasteful number, since it uses less digits than its factorization.

205711675755545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6105110152.

The product of its (nonzero) digits is 257250000, while the sum is 65.

The spelling of 205711675755545 in words is "two hundred five trillion, seven hundred eleven billion, six hundred seventy-five million, seven hundred fifty-five thousand, five hundred forty-five".