165346277389 has 2 divisors, whose sum is σ = 165346277390. Its totient is φ = 165346277388.

The previous prime is 165346277357. The next prime is 165346277431. The reversal of 165346277389 is 983772643561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110141015625 + 55205261764 = 331875^2 + 234958^2 .

It is a cyclic number.

It is not a de Polignac number, because 165346277389 - 2⁵ = 165346277357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165346274389) 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, 82673138694 + 82673138695.

It is an arithmetic number, because the mean of its divisors is an integer number (82673138695).

Almost surely, 2^165346277389 is an apocalyptic number.

It is an amenable number.

165346277389 is a deficient number, since it is larger than the sum of its proper divisors (1).

165346277389 is an equidigital number, since it uses as much as digits as its factorization.

165346277389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45722880, while the sum is 61.

The spelling of 165346277389 in words is "one hundred sixty-five billion, three hundred forty-six million, two hundred seventy-seven thousand, three hundred eighty-nine".