169978798079 has 8 divisors (see below), whose sum is σ = 171653514240. Its totient is φ = 168304552056.

The previous prime is 169978798069. The next prime is 169978798081. The reversal of 169978798079 is 970897879961.

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 169978798079 - 2¹⁶ = 169978732543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 169978797994 and 169978798012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169978798069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632582 + ... + 860300.

It is an arithmetic number, because the mean of its divisors is an integer number (21456689280).

Almost surely, 2^169978798079 is an apocalyptic number.

169978798079 is a deficient number, since it is larger than the sum of its proper divisors (1674716161).

169978798079 is a wasteful number, since it uses less digits than its factorization.

169978798079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235069.

The product of its (nonzero) digits is 864162432, while the sum is 80.

The spelling of 169978798079 in words is "one hundred sixty-nine billion, nine hundred seventy-eight million, seven hundred ninety-eight thousand, seventy-nine".