171386091343009 has 4 divisors (see below), whose sum is σ = 171386118197316. Its totient is φ = 171386064488704.

The previous prime is 171386091343003. The next prime is 171386091343073. The reversal of 171386091343009 is 900343190683171.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 49217282343009 + 122168809000000 = 7015503^2 + 11053000^2 .

It is a cyclic number.

It is not a de Polignac number, because 171386091343009 - 2⁹ = 171386091342497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171386091343003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2238057 + ... + 18648889.

It is an arithmetic number, because the mean of its divisors is an integer number (42846529549329).

Almost surely, 2^{171386091343009} is an apocalyptic number.

It is an amenable number.

171386091343009 is a deficient number, since it is larger than the sum of its proper divisors (26854307).

171386091343009 is a wasteful number, since it uses less digits than its factorization.

171386091343009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26854306.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 171386091343009 in words is "one hundred seventy-one trillion, three hundred eighty-six billion, ninety-one million, three hundred forty-three thousand, nine".