2178681333216 has 48 divisors (see below), whose sum is σ = 5719859956944. Its totient is φ = 726122799104.

The previous prime is 2178681333203. The next prime is 2178681333271. The reversal of 2178681333216 is 6123331868712.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956595 + ... + 2296178.

It is an arithmetic number, because the mean of its divisors is an integer number (119163749103).

Almost surely, 2^{2178681333216} is an apocalyptic number.

It is an amenable number.

2178681333216 is an abundant number, since it is smaller than the sum of its proper divisors (3541178623728).

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

2178681333216 is a wasteful number, since it uses less digits than its factorization.

2178681333216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259763 (or 3259755 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The spelling of 2178681333216 in words is "two trillion, one hundred seventy-eight billion, six hundred eighty-one million, three hundred thirty-three thousand, two hundred sixteen".