181161468 has 48 divisors (see below), whose sum is σ = 474547360. Its totient is φ = 59761152.

The previous prime is 181161443. The next prime is 181161479. The reversal of 181161468 is 864161181.

181161468 is a `hidden beast` number, since 181 + 16 + 1 + 468 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1830 + ... + 19122.

Almost surely, 2^181161468 is an apocalyptic number.

181161468 is a gapful number since it is divisible by the number (18) 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 181161468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237273680).

181161468 is an abundant number, since it is smaller than the sum of its proper divisors (293385892).

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

181161468 is a wasteful number, since it uses less digits than its factorization.

181161468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17403 (or 17395 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 181161468 is about 13459.6236202949. The cubic root of 181161468 is about 565.8334404002.

The spelling of 181161468 in words is "one hundred eighty-one million, one hundred sixty-one thousand, four hundred sixty-eight".