181107856 has 20 divisors (see below), whose sum is σ = 352435900. Its totient is φ = 90156672.

The previous prime is 181107853. The next prime is 181107869. The reversal of 181107856 is 658701181.

181107856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 144384256 + 36723600 = 12016^2 + 6060^2 .

It is not an unprimeable number, because it can be changed into a prime (181107853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21051 + ... + 28378.

It is an arithmetic number, because the mean of its divisors is an integer number (17621795).

Almost surely, 2^181107856 is an apocalyptic number.

181107856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

181107856 is a deficient number, since it is larger than the sum of its proper divisors (171328044).

181107856 is a wasteful number, since it uses less digits than its factorization.

181107856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49666 (or 49660 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 37.

The square root of 181107856 is about 13457.6318867771. The cubic root of 181107856 is about 565.7776182733. Note that the first 3 decimals are identical.

The spelling of 181107856 in words is "one hundred eighty-one million, one hundred seven thousand, eight hundred fifty-six".