118420775187 has 16 divisors (see below), whose sum is σ = 185498277888. Its totient is φ = 66249384480.

The previous prime is 118420775107. The next prime is 118420775191. The reversal of 118420775187 is 781577024811.

It is not a de Polignac number, because 118420775187 - 2¹⁹ = 118420250899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118420775107) 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, 138019123 + ... + 138019980.

It is an arithmetic number, because the mean of its divisors is an integer number (11593642368).

Almost surely, 2^118420775187 is an apocalyptic number.

118420775187 is a deficient number, since it is larger than the sum of its proper divisors (67077502701).

118420775187 is a wasteful number, since it uses less digits than its factorization.

118420775187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276039130.

The product of its (nonzero) digits is 878080, while the sum is 51.

Adding to 118420775187 its reverse (781577024811), we get a palindrome (899997799998).

The spelling of 118420775187 in words is "one hundred eighteen billion, four hundred twenty million, seven hundred seventy-five thousand, one hundred eighty-seven".