170891979068 has 6 divisors (see below), whose sum is σ = 299060963376. Its totient is φ = 85445989532.

The previous prime is 170891979047. The next prime is 170891979079. The reversal of 170891979068 is 860979198071.

It is a junction number, because it is equal to n+sod(n) for n = 170891978995 and 170891979013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21361497380 + ... + 21361497387.

It is an arithmetic number, because the mean of its divisors is an integer number (49843493896).

Almost surely, 2^170891979068 is an apocalyptic number.

It is an amenable number.

170891979068 is a deficient number, since it is larger than the sum of its proper divisors (128168984308).

170891979068 is a wasteful number, since it uses less digits than its factorization.

170891979068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42722994771 (or 42722994769 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 65.

The spelling of 170891979068 in words is "one hundred seventy billion, eight hundred ninety-one million, nine hundred seventy-nine thousand, sixty-eight".