161345231623 has 2 divisors, whose sum is σ = 161345231624. Its totient is φ = 161345231622.

The previous prime is 161345231581. The next prime is 161345231629. The reversal of 161345231623 is 326132543161.

161345231623 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 (326132543161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161345231623 - 2¹⁷ = 161345100551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161345231629) 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, 80672615811 + 80672615812.

It is an arithmetic number, because the mean of its divisors is an integer number (80672615812).

Almost surely, 2^161345231623 is an apocalyptic number.

161345231623 is a deficient number, since it is larger than the sum of its proper divisors (1).

161345231623 is an equidigital number, since it uses as much as digits as its factorization.

161345231623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 37.

Adding to 161345231623 its reverse (326132543161), we get a palindrome (487477774784).

The spelling of 161345231623 in words is "one hundred sixty-one billion, three hundred forty-five million, two hundred thirty-one thousand, six hundred twenty-three".