115516420171 has 2 divisors, whose sum is σ = 115516420172. Its totient is φ = 115516420170.

The previous prime is 115516420169. The next prime is 115516420177. The reversal of 115516420171 is 171024615511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115516420171 - 2¹ = 115516420169 is a prime.

Together with 115516420169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (115516420177) 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 as a sum of consecutive naturals, namely, 57758210085 + 57758210086.

It is an arithmetic number, because the mean of its divisors is an integer number (57758210086).

Almost surely, 2^115516420171 is an apocalyptic number.

115516420171 is a deficient number, since it is larger than the sum of its proper divisors (1).

115516420171 is an equidigital number, since it uses as much as digits as its factorization.

115516420171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 34.

The spelling of 115516420171 in words is "one hundred fifteen billion, five hundred sixteen million, four hundred twenty thousand, one hundred seventy-one".