161716281423 has 32 divisors (see below), whose sum is σ = 220812533760. Its totient is φ = 105248332800.

The previous prime is 161716281407. The next prime is 161716281431. The reversal of 161716281423 is 324182617161.

It is not a de Polignac number, because 161716281423 - 2⁴ = 161716281407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161716281443) 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 31 ways as a sum of consecutive naturals, for example, 29905986 + ... + 29911392.

It is an arithmetic number, because the mean of its divisors is an integer number (6900391680).

Almost surely, 2^161716281423 is an apocalyptic number.

161716281423 is a deficient number, since it is larger than the sum of its proper divisors (59096252337).

161716281423 is a wasteful number, since it uses less digits than its factorization.

161716281423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6887.

The product of its digits is 96768, while the sum is 42.

Adding to 161716281423 its reverse (324182617161), we get a palindrome (485898898584).

The spelling of 161716281423 in words is "one hundred sixty-one billion, seven hundred sixteen million, two hundred eighty-one thousand, four hundred twenty-three".