2188478109216 has 96 divisors (see below), whose sum is σ = 6613357484160. Its totient is φ = 620715350016.

The previous prime is 2188478109203. The next prime is 2188478109217. The reversal of 2188478109216 is 6129018748812.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (2188478109217) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11793571 + ... + 11977698.

It is an arithmetic number, because the mean of its divisors is an integer number (68889140460).

Almost surely, 2^{2188478109216} is an apocalyptic number.

It is an amenable number.

2188478109216 is an abundant number, since it is smaller than the sum of its proper divisors (4424879374944).

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

2188478109216 is a wasteful number, since it uses less digits than its factorization.

2188478109216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23771426 (or 23771418 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 57.

The spelling of 2188478109216 in words is "two trillion, one hundred eighty-eight billion, four hundred seventy-eight million, one hundred nine thousand, two hundred sixteen".