169849405441 has 4 divisors (see below), whose sum is σ = 169867858500. Its totient is φ = 169830952384.

The previous prime is 169849405423. The next prime is 169849405459. The reversal of 169849405441 is 144504948961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 144504948961 = 67 ⋅2156790283.

It is an interprime number because it is at equal distance from previous prime (169849405423) and next prime (169849405459).

It can be written as a sum of positive squares in 2 ways, for example, as 14242035600 + 155607369841 = 119340^2 + 394471^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169849405441 is a prime.

It is a super-2 number, since 2×169849405441² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169849405471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9212716 + ... + 9231133.

It is an arithmetic number, because the mean of its divisors is an integer number (42466964625).

Almost surely, 2^169849405441 is an apocalyptic number.

It is an amenable number.

169849405441 is a deficient number, since it is larger than the sum of its proper divisors (18453059).

169849405441 is an equidigital number, since it uses as much as digits as its factorization.

169849405441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18453058.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 169849405441 in words is "one hundred sixty-nine billion, eight hundred forty-nine million, four hundred five thousand, four hundred forty-one".