842169949189 has 4 divisors (see below), whose sum is σ = 842279600140. Its totient is φ = 842060298240.

The previous prime is 842169949183. The next prime is 842169949193. The reversal of 842169949189 is 981949961248.

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 680451761025 + 161718188164 = 824895^2 + 402142^2 .

It is a cyclic number.

It is not a de Polignac number, because 842169949189 - 2⁵ = 842169949157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842169949183) 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, 54813954 + ... + 54829315.

It is an arithmetic number, because the mean of its divisors is an integer number (210569900035).

Almost surely, 2^842169949189 is an apocalyptic number.

It is an amenable number.

842169949189 is a deficient number, since it is larger than the sum of its proper divisors (109650951).

842169949189 is a wasteful number, since it uses less digits than its factorization.

842169949189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109650950.

The product of its digits is 80621568, while the sum is 70.

The spelling of 842169949189 in words is "eight hundred forty-two billion, one hundred sixty-nine million, nine hundred forty-nine thousand, one hundred eighty-nine".