118716518281 has 4 divisors (see below), whose sum is σ = 118718280964. Its totient is φ = 118714755600.

The previous prime is 118716518267. The next prime is 118716518287. The reversal of 118716518281 is 182815617811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66675502656 + 52041015625 = 258216^2 + 228125^2 .

It is a cyclic number.

It is not a de Polignac number, because 118716518281 - 2¹³ = 118716510089 is a prime.

It is a super-2 number, since 2×118716518281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118716518287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776130 + ... + 916411.

It is an arithmetic number, because the mean of its divisors is an integer number (29679570241).

Almost surely, 2^118716518281 is an apocalyptic number.

It is an amenable number.

118716518281 is a deficient number, since it is larger than the sum of its proper divisors (1762683).

118716518281 is an equidigital number, since it uses as much as digits as its factorization.

118716518281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762682.

The product of its digits is 215040, while the sum is 49.

The spelling of 118716518281 in words is "one hundred eighteen billion, seven hundred sixteen million, five hundred eighteen thousand, two hundred eighty-one".