2684138018216 has 8 divisors (see below), whose sum is σ = 5032758784170. Its totient is φ = 1342069009104.

The previous prime is 2684138018213. The next prime is 2684138018257. The reversal of 2684138018216 is 6128108314862.

It can be written as a sum of positive squares in only one way, i.e., 2661315873316 + 22822144900 = 1631354^2 + 151070^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2684138018213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167758626131 + ... + 167758626146.

Almost surely, 2^{2684138018216} is an apocalyptic number.

It is an amenable number.

2684138018216 is a deficient number, since it is larger than the sum of its proper divisors (2348620765954).

2684138018216 is a wasteful number, since it uses less digits than its factorization.

2684138018216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335517252283 (or 335517252279 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The spelling of 2684138018216 in words is "two trillion, six hundred eighty-four billion, one hundred thirty-eight million, eighteen thousand, two hundred sixteen".