1944769161 has 16 divisors (see below), whose sum is σ = 2627975168. Its totient is φ = 1279152000.

The previous prime is 1944769157. The next prime is 1944769181. The reversal of 1944769161 is 1619674491.

It is not a de Polignac number, because 1944769161 - 2² = 1944769157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1944769161.

It is not an unprimeable number, because it can be changed into a prime (1944769181) 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 15 ways as a sum of consecutive naturals, for example, 54861 + ... + 83061.

It is an arithmetic number, because the mean of its divisors is an integer number (164248448).

Almost surely, 2^1944769161 is an apocalyptic number.

It is an amenable number.

1944769161 is a deficient number, since it is larger than the sum of its proper divisors (683206007).

1944769161 is a wasteful number, since it uses less digits than its factorization.

1944769161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28512.

The product of its digits is 326592, while the sum is 48.

The square root of 1944769161 is about 44099.5369703583. The cubic root of 1944769161 is about 1248.2148728839.

The spelling of 1944769161 in words is "one billion, nine hundred forty-four million, seven hundred sixty-nine thousand, one hundred sixty-one".