118416681815 has 4 divisors (see below), whose sum is σ = 142100018184. Its totient is φ = 94733345448.

The previous prime is 118416681811. The next prime is 118416681821. The reversal of 118416681815 is 518186614811.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 118416681815 - 2² = 118416681811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118416681811) 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, 11841668177 + ... + 11841668186.

It is an arithmetic number, because the mean of its divisors is an integer number (35525004546).

Almost surely, 2^118416681815 is an apocalyptic number.

118416681815 is a deficient number, since it is larger than the sum of its proper divisors (23683336369).

118416681815 is an equidigital number, since it uses as much as digits as its factorization.

118416681815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23683336368.

The product of its digits is 368640, while the sum is 50.

The spelling of 118416681815 in words is "one hundred eighteen billion, four hundred sixteen million, six hundred eighty-one thousand, eight hundred fifteen".