2178218631960 has 384 divisors, whose sum is σ = 8411635814400. Its totient is φ = 478349245440.

The previous prime is 2178218631899. The next prime is 2178218631989. The reversal of 2178218631960 is 691368128712.

2178218631960 is a `hidden beast` number, since 2 + 17 + 82 + 186 + 319 + 60 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2178218631897 and 2178218631906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10758382 + ... + 10958978.

It is an arithmetic number, because the mean of its divisors is an integer number (21905301600).

Almost surely, 2^{2178218631960} is an apocalyptic number.

2178218631960 is a gapful number since it is divisible by the number (20) 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 2178218631960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4205817907200).

2178218631960 is an abundant number, since it is smaller than the sum of its proper divisors (6233417182440).

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

2178218631960 is a wasteful number, since it uses less digits than its factorization.

2178218631960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200791 (or 200784 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 2178218631960 in words is "two trillion, one hundred seventy-eight billion, two hundred eighteen million, six hundred thirty-one thousand, nine hundred sixty".