118418642550 has 240 divisors, whose sum is σ = 354979936080. Its totient is φ = 29096444160.

The previous prime is 118418642549. The next prime is 118418642581. The reversal of 118418642550 is 55246814811.

118418642550 is a `hidden beast` number, since 1 + 1 + 84 + 18 + 6 + 4 + 2 + 550 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 118418642496 and 118418642505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 34694644 + ... + 34698056.

It is an arithmetic number, because the mean of its divisors is an integer number (1479083067).

Almost surely, 2^118418642550 is an apocalyptic number.

118418642550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 118418642550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177489968040).

118418642550 is an abundant number, since it is smaller than the sum of its proper divisors (236561293530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

118418642550 is a wasteful number, since it uses less digits than its factorization.

118418642550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4109 (or 4095 counting only the distinct ones).

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

The spelling of 118418642550 in words is "one hundred eighteen billion, four hundred eighteen million, six hundred forty-two thousand, five hundred fifty".