165723940123043 has 8 divisors (see below), whose sum is σ = 169128513767520. Its totient is φ = 162349100746560.

The previous prime is 165723940123039. The next prime is 165723940123087. The reversal of 165723940123043 is 340321049327561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165723940123043 - 2² = 165723940123039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165723940122982 and 165723940123000.

It is not an unprimeable number, because it can be changed into a prime (165723940122043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7433555738 + ... + 7433578031.

It is an arithmetic number, because the mean of its divisors is an integer number (21141064220940).

Almost surely, 2^{165723940123043} is an apocalyptic number.

165723940123043 is a deficient number, since it is larger than the sum of its proper divisors (3404573644477).

165723940123043 is a wasteful number, since it uses less digits than its factorization.

165723940123043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14867133997.

The product of its (nonzero) digits is 3265920, while the sum is 50.

The spelling of 165723940123043 in words is "one hundred sixty-five trillion, seven hundred twenty-three billion, nine hundred forty million, one hundred twenty-three thousand, forty-three".