2189686918479 has 8 divisors (see below), whose sum is σ = 2919592271280. Its totient is φ = 1459786422336.

The previous prime is 2189686918457. The next prime is 2189686918487. The reversal of 2189686918479 is 9748196869812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2189686918479 - 2¹³ = 2189686910287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189686918439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15867 + ... + 2092755.

It is an arithmetic number, because the mean of its divisors is an integer number (364949033910).

Almost surely, 2^{2189686918479} is an apocalyptic number.

2189686918479 is a deficient number, since it is larger than the sum of its proper divisors (729905352801).

2189686918479 is a wasteful number, since it uses less digits than its factorization.

2189686918479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428329.

The product of its digits is 752467968, while the sum is 78.

The spelling of 2189686918479 in words is "two trillion, one hundred eighty-nine billion, six hundred eighty-six million, nine hundred eighteen thousand, four hundred seventy-nine".