165213275389 has 2 divisors, whose sum is σ = 165213275390. Its totient is φ = 165213275388.

The previous prime is 165213275347. The next prime is 165213275477. The reversal of 165213275389 is 983572312561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149467292100 + 15745983289 = 386610^2 + 125483^2 .

It is a cyclic number.

It is not a de Polignac number, because 165213275389 - 2⁷ = 165213275261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165213270389) 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, 82606637694 + 82606637695.

It is an arithmetic number, because the mean of its divisors is an integer number (82606637695).

Almost surely, 2^165213275389 is an apocalyptic number.

It is an amenable number.

165213275389 is a deficient number, since it is larger than the sum of its proper divisors (1).

165213275389 is an equidigital number, since it uses as much as digits as its factorization.

165213275389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 52.

The spelling of 165213275389 in words is "one hundred sixty-five billion, two hundred thirteen million, two hundred seventy-five thousand, three hundred eighty-nine".