118209861000 has 960 divisors, whose sum is σ = 519373895040. Its totient is φ = 24548832000.

The previous prime is 118209860999. The next prime is 118209861041. The reversal of 118209861000 is 168902811.

118209861000 is a `hidden beast` number, since 1 + 18 + 20 + 9 + 8 + 610 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 239 ways as a sum of consecutive naturals, for example, 68606139 + ... + 68607861.

It is an arithmetic number, because the mean of its divisors is an integer number (541014474).

Almost surely, 2^118209861000 is an apocalyptic number.

118209861000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 118209861000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259686947520).

118209861000 is an abundant number, since it is smaller than the sum of its proper divisors (401164034040).

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

118209861000 is a wasteful number, since it uses less digits than its factorization.

118209861000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785 (or 1751 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 118209861000 in words is "one hundred eighteen billion, two hundred nine million, eight hundred sixty-one thousand".