161171044 has 6 divisors (see below), whose sum is σ = 282049334. Its totient is φ = 80585520.

The previous prime is 161171011. The next prime is 161171071. The reversal of 161171044 is 440171161.

It can be written as a sum of positive squares in only one way, i.e., 150994944 + 10176100 = 12288^2 + 3190^2 .

It is a super-2 number, since 2×161171044² = 51952210848099872, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20146377 + ... + 20146384.

Almost surely, 2^161171044 is an apocalyptic number.

It is an amenable number.

161171044 is a deficient number, since it is larger than the sum of its proper divisors (120878290).

161171044 is a wasteful number, since it uses less digits than its factorization.

161171044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40292765 (or 40292763 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 161171044 is about 12695.3158290765. The cubic root of 161171044 is about 544.2047645032.

It can be divided in two parts, 16117 and 1044, that added together give a square (17161 = 131²).

The spelling of 161171044 in words is "one hundred sixty-one million, one hundred seventy-one thousand, forty-four".