171802443814849 has 8 divisors (see below), whose sum is σ = 171962069809320. Its totient is φ = 171642826308096.

The previous prime is 171802443814747. The next prime is 171802443814871. The reversal of 171802443814849 is 948418344208171.

It can be written as a sum of positive squares in 4 ways, for example, as 26869377210624 + 144933066604225 = 5183568^2 + 12038815^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 171802443814849 - 2⁷ = 171802443814721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171802443814549) 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 in 7 ways as a sum of consecutive naturals, for example, 38744839 + ... + 42950755.

It is an arithmetic number, because the mean of its divisors is an integer number (21495258726165).

Almost surely, 2^{171802443814849} is an apocalyptic number.

It is an amenable number.

171802443814849 is a deficient number, since it is larger than the sum of its proper divisors (159625994471).

171802443814849 is a wasteful number, since it uses less digits than its factorization.

171802443814849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4243859.

The product of its (nonzero) digits is 49545216, while the sum is 64.

The spelling of 171802443814849 in words is "one hundred seventy-one trillion, eight hundred two billion, four hundred forty-three million, eight hundred fourteen thousand, eight hundred forty-nine".