171611404423 has 2 divisors, whose sum is σ = 171611404424. Its totient is φ = 171611404422.

The previous prime is 171611404409. The next prime is 171611404429. The reversal of 171611404423 is 324404116171.

It is a strong prime.

It is an emirp because it is prime and its reverse (324404116171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171611404423 - 2²¹ = 171609307271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171611404429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85805702211 + 85805702212.

It is an arithmetic number, because the mean of its divisors is an integer number (85805702212).

Almost surely, 2^171611404423 is an apocalyptic number.

171611404423 is a deficient number, since it is larger than the sum of its proper divisors (1).

171611404423 is an equidigital number, since it uses as much as digits as its factorization.

171611404423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 171611404423 in words is "one hundred seventy-one billion, six hundred eleven million, four hundred four thousand, four hundred twenty-three".