161205571106 has 16 divisors (see below), whose sum is σ = 242983983168. Its totient is φ = 80211003600.

The previous prime is 161205570961. The next prime is 161205571183. The reversal of 161205571106 is 601175502161.

It is a super-2 number, since 2×161205571106² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4468316 + ... + 4504248.

It is an arithmetic number, because the mean of its divisors is an integer number (15186498948).

Almost surely, 2^161205571106 is an apocalyptic number.

161205571106 is a deficient number, since it is larger than the sum of its proper divisors (81778412062).

161205571106 is a wasteful number, since it uses less digits than its factorization.

161205571106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46777.

The product of its (nonzero) digits is 12600, while the sum is 35.

The spelling of 161205571106 in words is "one hundred sixty-one billion, two hundred five million, five hundred seventy-one thousand, one hundred six".