118436856187 has 4 divisors (see below), whose sum is σ = 127547383600. Its totient is φ = 109326328776.

The previous prime is 118436856179. The next prime is 118436856203. The reversal of 118436856187 is 781658634811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781658634811 = 883 ⋅885230617.

It is a cyclic number.

It is not a de Polignac number, because 118436856187 - 2³ = 118436856179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118436856127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4555263687 + ... + 4555263712.

It is an arithmetic number, because the mean of its divisors is an integer number (31886845900).

Almost surely, 2^118436856187 is an apocalyptic number.

118436856187 is a deficient number, since it is larger than the sum of its proper divisors (9110527413).

118436856187 is an equidigital number, since it uses as much as digits as its factorization.

118436856187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9110527412.

The product of its digits is 7741440, while the sum is 58.

The spelling of 118436856187 in words is "one hundred eighteen billion, four hundred thirty-six million, eight hundred fifty-six thousand, one hundred eighty-seven".