1944169361 has 4 divisors (see below), whose sum is σ = 1970801892. Its totient is φ = 1917536832.

The previous prime is 1944169333. The next prime is 1944169379. The reversal of 1944169361 is 1639614491.

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 478734400 + 1465434961 = 21880^2 + 38281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1944169361 is a prime.

It is a super-2 number, since 2×1944169361² = 7559589008502296642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1944169561) 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, 13316156 + ... + 13316301.

It is an arithmetic number, because the mean of its divisors is an integer number (492700473).

Almost surely, 2^1944169361 is an apocalyptic number.

It is an amenable number.

1944169361 is a deficient number, since it is larger than the sum of its proper divisors (26632531).

1944169361 is an equidigital number, since it uses as much as digits as its factorization.

1944169361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26632530.

The product of its digits is 139968, while the sum is 44.

The square root of 1944169361 is about 44092.7359210108. The cubic root of 1944169361 is about 1248.0865360993.

The spelling of 1944169361 in words is "one billion, nine hundred forty-four million, one hundred sixty-nine thousand, three hundred sixty-one".