2139817885189 has 2 divisors, whose sum is σ = 2139817885190. Its totient is φ = 2139817885188.

The previous prime is 2139817885169. The next prime is 2139817885213. The reversal of 2139817885189 is 9815887189312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2137394292289 + 2423592900 = 1461983^2 + 49230^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139817885189 - 2⁵ = 2139817885157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2139817885169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069908942594 + 1069908942595.

It is an arithmetic number, because the mean of its divisors is an integer number (1069908942595).

Almost surely, 2^{2139817885189} is an apocalyptic number.

It is an amenable number.

2139817885189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139817885189 is an equidigital number, since it uses as much as digits as its factorization.

2139817885189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69672960, while the sum is 70.

The spelling of 2139817885189 in words is "two trillion, one hundred thirty-nine billion, eight hundred seventeen million, eight hundred eighty-five thousand, one hundred eighty-nine".