118211616 has 144 divisors (see below), whose sum is σ = 364845600. Its totient is φ = 37231488.

The previous prime is 118211609. The next prime is 118211617. The reversal of 118211616 is 616112811.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 118211616.

It is not an unprimeable number, because it can be changed into a prime (118211617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311715 + ... + 312093.

It is an arithmetic number, because the mean of its divisors is an integer number (2533650).

Almost surely, 2^118211616 is an apocalyptic number.

118211616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 118211616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182422800).

118211616 is an abundant number, since it is smaller than the sum of its proper divisors (246633984).

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

118211616 is a wasteful number, since it uses less digits than its factorization.

118211616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 403 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 118211616 is about 10872.5165440205. The cubic root of 118211616 is about 490.7798438647.

The spelling of 118211616 in words is "one hundred eighteen million, two hundred eleven thousand, six hundred sixteen".