171494767813 has 2 divisors, whose sum is σ = 171494767814. Its totient is φ = 171494767812.

The previous prime is 171494767799. The next prime is 171494767817. The reversal of 171494767813 is 318767494171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162427538529 + 9067229284 = 403023^2 + 95222^2 .

It is a cyclic number.

It is not a de Polignac number, because 171494767813 - 2¹³ = 171494759621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171494767817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85747383906 + 85747383907.

It is an arithmetic number, because the mean of its divisors is an integer number (85747383907).

Almost surely, 2^171494767813 is an apocalyptic number.

It is an amenable number.

171494767813 is a deficient number, since it is larger than the sum of its proper divisors (1).

171494767813 is an equidigital number, since it uses as much as digits as its factorization.

171494767813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7112448, while the sum is 58.

The spelling of 171494767813 in words is "one hundred seventy-one billion, four hundred ninety-four million, seven hundred sixty-seven thousand, eight hundred thirteen".