161773312 has 18 divisors (see below), whose sum is σ = 322915208. Its totient is φ = 80886528.

The previous prime is 161773307. The next prime is 161773321. The reversal of 161773312 is 213377161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315708 + ... + 316219.

Almost surely, 2^161773312 is an apocalyptic number.

It is an amenable number.

161773312 is a deficient number, since it is larger than the sum of its proper divisors (161141896).

161773312 is an frugal number, since it uses more digits than its factorization.

161773312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631943 (or 631929 counting only the distinct ones).

The product of its digits is 5292, while the sum is 31.

The square root of 161773312 is about 12719.0137982471. The cubic root of 161773312 is about 544.8817879011.

The spelling of 161773312 in words is "one hundred sixty-one million, seven hundred seventy-three thousand, three hundred twelve".