118365681 has 16 divisors (see below), whose sum is σ = 183325568. Its totient is φ = 66528000.

The previous prime is 118365673. The next prime is 118365691. The reversal of 118365681 is 186563811.

It is not a de Polignac number, because 118365681 - 2³ = 118365673 is a prime.

It is a super-2 number, since 2×118365681² = 28020868877187522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118365661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44920 + ... + 47481.

It is an arithmetic number, because the mean of its divisors is an integer number (11457848).

Almost surely, 2^118365681 is an apocalyptic number.

It is an amenable number.

118365681 is a deficient number, since it is larger than the sum of its proper divisors (64959887).

118365681 is an equidigital number, since it uses as much as digits as its factorization.

118365681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92472.

The product of its digits is 34560, while the sum is 39.

The square root of 118365681 is about 10879.5993032832. The cubic root of 118365681 is about 490.9929621539.

The spelling of 118365681 in words is "one hundred eighteen million, three hundred sixty-five thousand, six hundred eighty-one".