171547948111 has 2 divisors, whose sum is σ = 171547948112. Its totient is φ = 171547948110.

The previous prime is 171547948063. The next prime is 171547948153. The reversal of 171547948111 is 111849745171.

It is a strong prime.

It is an emirp because it is prime and its reverse (111849745171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171547948111 - 2²⁵ = 171514393679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171547948811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85773974055 + 85773974056.

It is an arithmetic number, because the mean of its divisors is an integer number (85773974056).

Almost surely, 2^171547948111 is an apocalyptic number.

171547948111 is a deficient number, since it is larger than the sum of its proper divisors (1).

171547948111 is an equidigital number, since it uses as much as digits as its factorization.

171547948111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 49.

The spelling of 171547948111 in words is "one hundred seventy-one billion, five hundred forty-seven million, nine hundred forty-eight thousand, one hundred eleven".