118365717919201 has 3 divisors (see below), whose sum is σ = 118365728798803. Its totient is φ = 118365707039600.

The previous prime is 118365717919151. The next prime is 118365717919321. The reversal of 118365717919201 is 102919717563811.

The square root of 118365717919201 is 10879601.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 32071279248801 + 86294438670400 = 5663151^2 + 9289480^2 .

It is not a de Polignac number, because 118365717919201 - 2²¹ = 118365715822049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118365717919201.

It is not an unprimeable number, because it can be changed into a prime (118365717919901) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5439801 + ... + 16319401.

Almost surely, 2^{118365717919201} is an apocalyptic number.

118365717919201 is the 10879601-st square number.

118365717919201 is the 5439801-st centered octagonal number.

It is an amenable number.

118365717919201 is a deficient number, since it is larger than the sum of its proper divisors (10879602).

118365717919201 is an frugal number, since it uses more digits than its factorization.

118365717919201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21759202 (or 10879601 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 61.

The spelling of 118365717919201 in words is "one hundred eighteen trillion, three hundred sixty-five billion, seven hundred seventeen million, nine hundred nineteen thousand, two hundred one".