165723940123087 has 2 divisors, whose sum is σ = 165723940123088. Its totient is φ = 165723940123086.

The previous prime is 165723940123039. The next prime is 165723940123097. The reversal of 165723940123087 is 780321049327561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165723940123087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165723940123097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82861970061543 + 82861970061544.

It is an arithmetic number, because the mean of its divisors is an integer number (82861970061544).

It is a 1-persistent number, because it is pandigital, but 2⋅165723940123087 = 331447880246174 is not.

Almost surely, 2^{165723940123087} is an apocalyptic number.

165723940123087 is a deficient number, since it is larger than the sum of its proper divisors (1).

165723940123087 is an equidigital number, since it uses as much as digits as its factorization.

165723940123087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 165723940123087 in words is "one hundred sixty-five trillion, seven hundred twenty-three billion, nine hundred forty million, one hundred twenty-three thousand, eighty-seven".