118418111087521 has 64 divisors (see below), whose sum is σ = 141800504186880. Its totient is φ = 96747988377600.

The previous prime is 118418111087503. The next prime is 118418111087527. The reversal of 118418111087521 is 125780111814811.

It is a happy number.

It is not a de Polignac number, because 118418111087521 - 2¹³ = 118418111079329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118418111087527) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20392301400 + ... + 20392307206.

It is an arithmetic number, because the mean of its divisors is an integer number (2215632877920).

Almost surely, 2^{118418111087521} is an apocalyptic number.

It is an amenable number.

118418111087521 is a deficient number, since it is larger than the sum of its proper divisors (23382393099359).

118418111087521 is a wasteful number, since it uses less digits than its factorization.

118418111087521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8674.

The product of its (nonzero) digits is 143360, while the sum is 49.

The spelling of 118418111087521 in words is "one hundred eighteen trillion, four hundred eighteen billion, one hundred eleven million, eighty-seven thousand, five hundred twenty-one".