169420506289 has 4 divisors (see below), whose sum is σ = 172197891700. Its totient is φ = 166643120880.

The previous prime is 169420506191. The next prime is 169420506293. The reversal of 169420506289 is 982605024961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3255843600 + 166164662689 = 57060^2 + 407633^2 .

It is a cyclic number.

It is not a de Polignac number, because 169420506289 - 2¹¹ = 169420504241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169427506289) 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, 1388692614 + ... + 1388692735.

It is an arithmetic number, because the mean of its divisors is an integer number (43049472925).

Almost surely, 2^169420506289 is an apocalyptic number.

It is an amenable number.

169420506289 is a deficient number, since it is larger than the sum of its proper divisors (2777385411).

169420506289 is an equidigital number, since it uses as much as digits as its factorization.

169420506289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777385410.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 169420506289 in words is "one hundred sixty-nine billion, four hundred twenty million, five hundred six thousand, two hundred eighty-nine".