169978207568 has 80 divisors (see below), whose sum is σ = 356444894400. Its totient is φ = 78059013120.

The previous prime is 169978207543. The next prime is 169978207583. The reversal of 169978207568 is 865702879961.

It is a happy number.

It is a super-3 number, since 3×169978207568³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 169978207498 and 169978207507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39172343 + ... + 39176681.

It is an arithmetic number, because the mean of its divisors is an integer number (4455561180).

Almost surely, 2^169978207568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169978207568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178222447200).

169978207568 is an abundant number, since it is smaller than the sum of its proper divisors (186466686832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

169978207568 is a wasteful number, since it uses less digits than its factorization.

169978207568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5260 (or 5254 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 68.

The spelling of 169978207568 in words is "one hundred sixty-nine billion, nine hundred seventy-eight million, two hundred seven thousand, five hundred sixty-eight".