205471667161 has 16 divisors (see below), whose sum is σ = 208505909248. Its totient is φ = 202462545600.

The previous prime is 205471667147. The next prime is 205471667183. The reversal of 205471667161 is 161766174502.

It is not a de Polignac number, because 205471667161 - 2²⁵ = 205438112729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205471667131) 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, 18912871 + ... + 18923731.

It is an arithmetic number, because the mean of its divisors is an integer number (13031619328).

Almost surely, 2^205471667161 is an apocalyptic number.

It is an amenable number.

205471667161 is a deficient number, since it is larger than the sum of its proper divisors (3034242087).

205471667161 is a wasteful number, since it uses less digits than its factorization.

205471667161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11992.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 205471667161 in words is "two hundred five billion, four hundred seventy-one million, six hundred sixty-seven thousand, one hundred sixty-one".