2118171230208 has 640 divisors, whose sum is σ = 6990052608000. Its totient is φ = 628516454400.

The previous prime is 2118171230167. The next prime is 2118171230233. The reversal of 2118171230208 is 8020321718112.

2118171230208 is a `hidden beast` number, since 211 + 8 + 1 + 7 + 1 + 230 + 208 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9498525585 + ... + 9498525807.

It is an arithmetic number, because the mean of its divisors is an integer number (10921957200).

Almost surely, 2^{2118171230208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2118171230208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3495026304000).

2118171230208 is an abundant number, since it is smaller than the sum of its proper divisors (4871881377792).

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

2118171230208 is an frugal number, since it uses more digits than its factorization.

2118171230208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 2118171230208 in words is "two trillion, one hundred eighteen billion, one hundred seventy-one million, two hundred thirty thousand, two hundred eight".