161911296 has 120 divisors (see below), whose sum is σ = 479242764. Its totient is φ = 52592640.

The previous prime is 161911279. The next prime is 161911303. The reversal of 161911296 is 692119161.

161911296 is a `hidden beast` number, since 1 + 619 + 11 + 29 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 161798400 + 112896 = 12720^2 + 336^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 161911296.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188500 + ... + 189356.

Almost surely, 2^161911296 is an apocalyptic number.

161911296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161911296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239621382).

161911296 is an abundant number, since it is smaller than the sum of its proper divisors (317331468).

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

161911296 is an equidigital number, since it uses as much as digits as its factorization.

161911296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 903 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 161911296 is about 12724.4369620035. The cubic root of 161911296 is about 545.0366622364.

The spelling of 161911296 in words is "one hundred sixty-one million, nine hundred eleven thousand, two hundred ninety-six".