118542475491 has 16 divisors (see below), whose sum is σ = 172436821248. Its totient is φ = 71839173600.

The previous prime is 118542475489. The next prime is 118542475511. The reversal of 118542475491 is 194574245811.

It is not a de Polignac number, because 118542475491 - 2¹ = 118542475489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118542475291) 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, 424965 + ... + 646281.

It is an arithmetic number, because the mean of its divisors is an integer number (10777301328).

Almost surely, 2^118542475491 is an apocalyptic number.

118542475491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

118542475491 is a deficient number, since it is larger than the sum of its proper divisors (53894345757).

118542475491 is a wasteful number, since it uses less digits than its factorization.

118542475491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237562.

The product of its digits is 1612800, while the sum is 51.

The spelling of 118542475491 in words is "one hundred eighteen billion, five hundred forty-two million, four hundred seventy-five thousand, four hundred ninety-one".