169801220159 has 4 divisors (see below), whose sum is σ = 170354318904. Its totient is φ = 169248121416.

The previous prime is 169801220117. The next prime is 169801220161. The reversal of 169801220159 is 951022108961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 951022108961 = 71 ⋅13394677591.

It is a cyclic number.

It is not a de Polignac number, because 169801220159 - 2²⁴ = 169784442943 is a prime.

It is a super-3 number, since 3×169801220159³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169801220059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276548912 + ... + 276549525.

It is an arithmetic number, because the mean of its divisors is an integer number (42588579726).

Almost surely, 2^169801220159 is an apocalyptic number.

169801220159 is a deficient number, since it is larger than the sum of its proper divisors (553098745).

169801220159 is an equidigital number, since it uses as much as digits as its factorization.

169801220159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553098744.

The product of its (nonzero) digits is 77760, while the sum is 44.

It can be divided in two parts, 1698012 and 20159, that added together give a palindrome (1718171).

The spelling of 169801220159 in words is "one hundred sixty-nine billion, eight hundred one million, two hundred twenty thousand, one hundred fifty-nine".