165723940123039 has 2 divisors, whose sum is σ = 165723940123040. Its totient is φ = 165723940123038.

The previous prime is 165723940123019. The next prime is 165723940123087. The reversal of 165723940123039 is 930321049327561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165723940123039 - 2³¹ = 165721792639391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165723940123019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82861970061519 + 82861970061520.

It is an arithmetic number, because the mean of its divisors is an integer number (82861970061520).

Almost surely, 2^{165723940123039} is an apocalyptic number.

165723940123039 is a deficient number, since it is larger than the sum of its proper divisors (1).

165723940123039 is an equidigital number, since it uses as much as digits as its factorization.

165723940123039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7348320, while the sum is 55.

The spelling of 165723940123039 in words is "one hundred sixty-five trillion, seven hundred twenty-three billion, nine hundred forty million, one hundred twenty-three thousand, thirty-nine".