118634566987 has 4 divisors (see below), whose sum is σ = 120579396016. Its totient is φ = 116689737960.

The previous prime is 118634566979. The next prime is 118634566991. The reversal of 118634566987 is 789665436811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789665436811 = 37 ⋅21342309103.

It is a cyclic number.

It is not a de Polignac number, because 118634566987 - 2³ = 118634566979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118634566937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972414423 + ... + 972414544.

It is an arithmetic number, because the mean of its divisors is an integer number (30144849004).

Almost surely, 2^118634566987 is an apocalyptic number.

118634566987 is a deficient number, since it is larger than the sum of its proper divisors (1944829029).

118634566987 is an equidigital number, since it uses as much as digits as its factorization.

118634566987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944829028.

The product of its digits is 52254720, while the sum is 64.

The spelling of 118634566987 in words is "one hundred eighteen billion, six hundred thirty-four million, five hundred sixty-six thousand, nine hundred eighty-seven".