171353353861 has 2 divisors, whose sum is σ = 171353353862. Its totient is φ = 171353353860.

The previous prime is 171353353859. The next prime is 171353353877. The reversal of 171353353861 is 168353353171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131565072961 + 39788280900 = 362719^2 + 199470^2 .

It is a cyclic number.

It is not a de Polignac number, because 171353353861 - 2¹ = 171353353859 is a prime.

Together with 171353353859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171353353891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85676676930 + 85676676931.

It is an arithmetic number, because the mean of its divisors is an integer number (85676676931).

Almost surely, 2^171353353861 is an apocalyptic number.

It is an amenable number.

171353353861 is a deficient number, since it is larger than the sum of its proper divisors (1).

171353353861 is an equidigital number, since it uses as much as digits as its factorization.

171353353861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 46.

The spelling of 171353353861 in words is "one hundred seventy-one billion, three hundred fifty-three million, three hundred fifty-three thousand, eight hundred sixty-one".