161523176163 has 4 divisors (see below), whose sum is σ = 215364234888. Its totient is φ = 107682117440.

The previous prime is 161523176149. The next prime is 161523176173. The reversal of 161523176163 is 361671325161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161523176163 - 2⁶ = 161523176099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161523176173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26920529358 + ... + 26920529363.

It is an arithmetic number, because the mean of its divisors is an integer number (53841058722).

Almost surely, 2^161523176163 is an apocalyptic number.

161523176163 is a deficient number, since it is larger than the sum of its proper divisors (53841058725).

161523176163 is an equidigital number, since it uses as much as digits as its factorization.

161523176163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53841058724.

The product of its digits is 136080, while the sum is 42.

The spelling of 161523176163 in words is "one hundred sixty-one billion, five hundred twenty-three million, one hundred seventy-six thousand, one hundred sixty-three".