161844730123 has 2 divisors, whose sum is σ = 161844730124. Its totient is φ = 161844730122.

The previous prime is 161844730093. The next prime is 161844730133. The reversal of 161844730123 is 321037448161.

161844730123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (321037448161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161844730123 - 2¹³ = 161844721931 is a prime.

It is a super-4 number, since 4×161844730123⁴ (a number of 46 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (161844730133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80922365061 + 80922365062.

It is an arithmetic number, because the mean of its divisors is an integer number (80922365062).

Almost surely, 2^161844730123 is an apocalyptic number.

161844730123 is a deficient number, since it is larger than the sum of its proper divisors (1).

161844730123 is an equidigital number, since it uses as much as digits as its factorization.

161844730123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 161844730123 in words is "one hundred sixty-one billion, eight hundred forty-four million, seven hundred thirty thousand, one hundred twenty-three".