181113376 has 36 divisors (see below), whose sum is σ = 378196938. Its totient is φ = 85082112.

The previous prime is 181113371. The next prime is 181113389. The reversal of 181113376 is 673311181.

It can be written as a sum of positive squares in 3 ways, for example, as 145829776 + 35283600 = 12076^2 + 5940^2 .

It is a super-2 number, since 2×181113376² = 65604109932234752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181113371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 313600 + ... + 314176.

Almost surely, 2^181113376 is an apocalyptic number.

181113376 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 181113376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189098469).

181113376 is an abundant number, since it is smaller than the sum of its proper divisors (197083562).

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

181113376 is an frugal number, since it uses more digits than its factorization.

181113376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181 (or 596 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 181113376 is about 13457.8369733030. The cubic root of 181113376 is about 565.7833663412.

The spelling of 181113376 in words is "one hundred eighty-one million, one hundred thirteen thousand, three hundred seventy-six".