161173058 has 18 divisors (see below), whose sum is σ = 248312883. Its totient is φ = 78458980.

The previous prime is 161173049. The next prime is 161173063. The reversal of 161173058 is 850371161.

It can be written as a sum of positive squares in only one way, i.e., 80586529 + 80586529 = 8977^2 + 8977^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8977.

It is a super-3 number, since 3×161173058³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

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 in 8 ways as a sum of consecutive naturals, for example, 843743 + ... + 843933.

Almost surely, 2^161173058 is an apocalyptic number.

161173058 is a deficient number, since it is larger than the sum of its proper divisors (87139825).

161173058 is an frugal number, since it uses more digits than its factorization.

161173058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 161173058 is about 12695.3951494233. The cubic root of 161173058 is about 544.2070312955.

Multiplying 161173058 by its sum of digits (32), we get a square (5157537856 = 71816²).

The spelling of 161173058 in words is "one hundred sixty-one million, one hundred seventy-three thousand, fifty-eight".