161165168 has 40 divisors (see below), whose sum is σ = 332175168. Its totient is φ = 75487232.

The previous prime is 161165149. The next prime is 161165171. The reversal of 161165168 is 861561161.

It is a super-2 number, since 2×161165168² = 51948422752936448, which contains 22 as substring.

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, 62105 + ... + 64647.

Almost surely, 2^161165168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161165168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166087584).

161165168 is an abundant number, since it is smaller than the sum of its proper divisors (171010000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161165168 is a wasteful number, since it uses less digits than its factorization.

161165168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2801 (or 2795 counting only the distinct ones).

The product of its digits is 8640, while the sum is 35.

The square root of 161165168 is about 12695.0844030278. The cubic root of 161165168 is about 544.1981508544.

The spelling of 161165168 in words is "one hundred sixty-one million, one hundred sixty-five thousand, one hundred sixty-eight".