161674445 has 8 divisors (see below), whose sum is σ = 194183136. Its totient is φ = 129223696.

The previous prime is 161674399. The next prime is 161674493. The reversal of 161674445 is 544476161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161674445 is a prime.

It is a super-2 number, since 2×161674445² = 52277252332116050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161674399 and 161674408.

It is a congruent number.

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, 8087 + ... + 19716.

It is an arithmetic number, because the mean of its divisors is an integer number (24272892).

Almost surely, 2^161674445 is an apocalyptic number.

It is an amenable number.

161674445 is a deficient number, since it is larger than the sum of its proper divisors (32508691).

161674445 is a wasteful number, since it uses less digits than its factorization.

161674445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28971.

The product of its digits is 80640, while the sum is 38.

The square root of 161674445 is about 12715.1266214694. The cubic root of 161674445 is about 544.7707646322.

The spelling of 161674445 in words is "one hundred sixty-one million, six hundred seventy-four thousand, four hundred forty-five".