165089884889 has 2 divisors, whose sum is σ = 165089884890. Its totient is φ = 165089884888.

The previous prime is 165089884769. The next prime is 165089884913. The reversal of 165089884889 is 988488980561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163472236489 + 1617648400 = 404317^2 + 40220^2 .

It is a cyclic number.

It is not a de Polignac number, because 165089884889 - 2¹² = 165089880793 is a prime.

It is not a weakly prime, because it can be changed into another prime (165019884889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82544942444 + 82544942445.

It is an arithmetic number, because the mean of its divisors is an integer number (82544942445).

Almost surely, 2^165089884889 is an apocalyptic number.

It is an amenable number.

165089884889 is a deficient number, since it is larger than the sum of its proper divisors (1).

165089884889 is an equidigital number, since it uses as much as digits as its factorization.

165089884889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 318504960, while the sum is 74.

The spelling of 165089884889 in words is "one hundred sixty-five billion, eighty-nine million, eight hundred eighty-four thousand, eight hundred eighty-nine".