2856169189 has 2 divisors, whose sum is σ = 2856169190. Its totient is φ = 2856169188.

The previous prime is 2856169163. The next prime is 2856169193. The reversal of 2856169189 is 9819616582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2370716100 + 485453089 = 48690^2 + 22033^2 .

It is a cyclic number.

It is not a de Polignac number, because 2856169189 - 2⁷ = 2856169061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2856169489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428084594 + 1428084595.

It is an arithmetic number, because the mean of its divisors is an integer number (1428084595).

Almost surely, 2^2856169189 is an apocalyptic number.

It is an amenable number.

2856169189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2856169189 is an equidigital number, since it uses as much as digits as its factorization.

2856169189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 55.

The square root of 2856169189 is about 53443.1397749047. The cubic root of 2856169189 is about 1418.8222047800.

The spelling of 2856169189 in words is "two billion, eight hundred fifty-six million, one hundred sixty-nine thousand, one hundred eighty-nine".