118618515 has 12 divisors (see below), whose sum is σ = 205605504. Its totient is φ = 63263184.

The previous prime is 118618477. The next prime is 118618517. The reversal of 118618515 is 515816811.

It is not a de Polignac number, because 118618515 - 2⁸ = 118618259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118618515.

It is not an unprimeable number, because it can be changed into a prime (118618517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1317939 + ... + 1318028.

It is an arithmetic number, because the mean of its divisors is an integer number (17133792).

Almost surely, 2^118618515 is an apocalyptic number.

118618515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

118618515 is a deficient number, since it is larger than the sum of its proper divisors (86986989).

118618515 is a wasteful number, since it uses less digits than its factorization.

118618515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635978 (or 2635975 counting only the distinct ones).

The product of its digits is 9600, while the sum is 36.

The square root of 118618515 is about 10891.2127423901. The cubic root of 118618515 is about 491.3423073050.

It can be divided in two parts, 1186 and 18515, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 118618515 in words is "one hundred eighteen million, six hundred eighteen thousand, five hundred fifteen".