171661607673 has 16 divisors (see below), whose sum is σ = 234816552960. Its totient is φ = 111487766544.

The previous prime is 171661607671. The next prime is 171661607717. The reversal of 171661607673 is 376706166171.

It is not a de Polignac number, because 171661607673 - 2¹ = 171661607671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (171661607671) 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 15 ways as a sum of consecutive naturals, for example, 1687813 + ... + 1786626.

It is an arithmetic number, because the mean of its divisors is an integer number (14676034560).

Almost surely, 2^171661607673 is an apocalyptic number.

It is an amenable number.

171661607673 is a deficient number, since it is larger than the sum of its proper divisors (63154945287).

171661607673 is a wasteful number, since it uses less digits than its factorization.

171661607673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474868.

The product of its (nonzero) digits is 1333584, while the sum is 51.

The spelling of 171661607673 in words is "one hundred seventy-one billion, six hundred sixty-one million, six hundred seven thousand, six hundred seventy-three".