2779889683189 has 2 divisors, whose sum is σ = 2779889683190. Its totient is φ = 2779889683188.

The previous prime is 2779889683187. The next prime is 2779889683199. The reversal of 2779889683189 is 9813869889772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2556129464100 + 223760219089 = 1598790^2 + 473033^2 .

It is a cyclic number.

It is not a de Polignac number, because 2779889683189 - 2¹ = 2779889683187 is a prime.

Together with 2779889683187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2779889683187) 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 as a sum of consecutive naturals, namely, 1389944841594 + 1389944841595.

It is an arithmetic number, because the mean of its divisors is an integer number (1389944841595).

Almost surely, 2^{2779889683189} is an apocalyptic number.

It is an amenable number.

2779889683189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2779889683189 is an equidigital number, since it uses as much as digits as its factorization.

2779889683189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5267275776, while the sum is 85.

The spelling of 2779889683189 in words is "two trillion, seven hundred seventy-nine billion, eight hundred eighty-nine million, six hundred eighty-three thousand, one hundred eighty-nine".