1644046056 has 24 divisors (see below), whose sum is σ = 4452624930. Its totient is φ = 548015328.

The previous prime is 1644046051. The next prime is 1644046057. The reversal of 1644046056 is 6506404461.

1644046056 is a `hidden beast` number, since 1 + 6 + 4 + 40 + 4 + 605 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1356743556 + 287302500 = 36834^2 + 16950^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×1644046056³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1644046056.

It is not an unprimeable number, because it can be changed into a prime (1644046051) 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 5 ways as a sum of consecutive naturals, for example, 11416915 + ... + 11417058.

Almost surely, 2^1644046056 is an apocalyptic number.

It is an amenable number.

1644046056 is an abundant number, since it is smaller than the sum of its proper divisors (2808578874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1644046056 is a wasteful number, since it uses less digits than its factorization.

1644046056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22833985 (or 22833978 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 1644046056 is about 40546.8378051853. The cubic root of 1644046056 is about 1180.2427098179.

The spelling of 1644046056 in words is "one billion, six hundred forty-four million, forty-six thousand, fifty-six".