161716111 has 2 divisors, whose sum is σ = 161716112. Its totient is φ = 161716110.

The previous prime is 161716073. The next prime is 161716117. The reversal of 161716111 is 111617161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161716111 - 2¹³ = 161707919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161716117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80858055 + 80858056.

It is an arithmetic number, because the mean of its divisors is an integer number (80858056).

Almost surely, 2^161716111 is an apocalyptic number.

161716111 is a deficient number, since it is larger than the sum of its proper divisors (1).

161716111 is an equidigital number, since it uses as much as digits as its factorization.

161716111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 25.

The square root of 161716111 is about 12716.7649581173. The cubic root of 161716111 is about 544.8175592242.

It can be divided in two parts, 1617161 and 11, that multiplied together give a palindrome (17788771).

The spelling of 161716111 in words is "one hundred sixty-one million, seven hundred sixteen thousand, one hundred eleven".