118191099778 has 16 divisors (see below), whose sum is σ = 187801541280. Its totient is φ = 55593781056.

The previous prime is 118191099773. The next prime is 118191099799. The reversal of 118191099778 is 877990191811.

It is not an unprimeable number, because it can be changed into a prime (118191099773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723576 + ... + 871747.

It is an arithmetic number, because the mean of its divisors is an integer number (11737596330).

Almost surely, 2^118191099778 is an apocalyptic number.

118191099778 is a deficient number, since it is larger than the sum of its proper divisors (69610441502).

118191099778 is a wasteful number, since it uses less digits than its factorization.

118191099778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597521.

The product of its (nonzero) digits is 2286144, while the sum is 61.

The spelling of 118191099778 in words is "one hundred eighteen billion, one hundred ninety-one million, ninety-nine thousand, seven hundred seventy-eight".