171858060149 has 2 divisors, whose sum is σ = 171858060150. Its totient is φ = 171858060148.

The previous prime is 171858060119. The next prime is 171858060173. The reversal of 171858060149 is 941060858171.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143400057124 + 28458003025 = 378682^2 + 168695^2 .

It is a cyclic number.

It is not a de Polignac number, because 171858060149 - 2²⁴ = 171841282933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 171858060097 and 171858060106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171858060119) 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, 85929030074 + 85929030075.

It is an arithmetic number, because the mean of its divisors is an integer number (85929030075).

Almost surely, 2^171858060149 is an apocalyptic number.

It is an amenable number.

171858060149 is a deficient number, since it is larger than the sum of its proper divisors (1).

171858060149 is an equidigital number, since it uses as much as digits as its factorization.

171858060149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 50.

The spelling of 171858060149 in words is "one hundred seventy-one billion, eight hundred fifty-eight million, sixty thousand, one hundred forty-nine".