118418642505 has 48 divisors (see below), whose sum is σ = 210409140240. Its totient is φ = 61591394304.

The previous prime is 118418642443. The next prime is 118418642509. The reversal of 118418642505 is 505246814811.

118418642505 is a `hidden beast` number, since 1 + 1 + 84 + 1 + 8 + 64 + 2 + 505 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 9368110521 + 109050531984 = 96789^2 + 330228^2 .

It is not a de Polignac number, because 118418642505 - 2⁸ = 118418642249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (118418642509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89847 + ... + 494883.

It is an arithmetic number, because the mean of its divisors is an integer number (4383523755).

Almost surely, 2^118418642505 is an apocalyptic number.

118418642505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

118418642505 is a deficient number, since it is larger than the sum of its proper divisors (91990497735).

118418642505 is a wasteful number, since it uses less digits than its factorization.

118418642505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405210 (or 405207 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 118418642505 in words is "one hundred eighteen billion, four hundred eighteen million, six hundred forty-two thousand, five hundred five".