118118550 has 96 divisors (see below), whose sum is σ = 338442624. Its totient is φ = 26944000.

The previous prime is 118118491. The next prime is 118118551. The reversal of 118118550 is 55811811.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118118551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25945 + ... + 30155.

It is an arithmetic number, because the mean of its divisors is an integer number (3525444).

Almost surely, 2^118118550 is an apocalyptic number.

118118550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 118118550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169221312).

118118550 is an abundant number, since it is smaller than the sum of its proper divisors (220324074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

118118550 is a wasteful number, since it uses less digits than its factorization.

118118550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254 (or 4249 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 30.

The square root of 118118550 is about 10868.2358274009. The cubic root of 118118550 is about 490.6510158355.

The spelling of 118118550 in words is "one hundred eighteen million, one hundred eighteen thousand, five hundred fifty".