161172968 has 96 divisors (see below), whose sum is σ = 353928960. Its totient is φ = 68640000.

The previous prime is 161172967. The next prime is 161172997. The reversal of 161172968 is 869271161.

It is a super-2 number, since 2×161172968² = 51953451227858048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

Its product of digits (36288) is a multiple of the sum of its prime divisors (216).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161172961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1230263 + ... + 1230393.

It is an arithmetic number, because the mean of its divisors is an integer number (3686760).

Almost surely, 2^161172968 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 161172968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176964480).

161172968 is an abundant number, since it is smaller than the sum of its proper divisors (192755992).

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

161172968 is a wasteful number, since it uses less digits than its factorization.

161172968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 216 counting only the distinct ones).

The product of its digits is 36288, while the sum is 41.

The square root of 161172968 is about 12695.3916048305. The cubic root of 161172968 is about 544.2069299993.

The spelling of 161172968 in words is "one hundred sixty-one million, one hundred seventy-two thousand, nine hundred sixty-eight".