1606641044 has 36 divisors (see below), whose sum is σ = 2886477300. Its totient is φ = 782471040.

The previous prime is 1606641041. The next prime is 1606641073. The reversal of 1606641044 is 4401466061.

It can be written as a sum of positive squares in 2 ways, for example, as 821968900 + 784672144 = 28670^2 + 28012^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1606641044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606641041) 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 11 ways as a sum of consecutive naturals, for example, 3083504 + ... + 3084024.

It is an arithmetic number, because the mean of its divisors is an integer number (80179925).

Almost surely, 2^1606641044 is an apocalyptic number.

It is an amenable number.

1606641044 is a deficient number, since it is larger than the sum of its proper divisors (1279836256).

1606641044 is a wasteful number, since it uses less digits than its factorization.

1606641044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1606641044 is about 40082.9270887244. The cubic root of 1606641044 is about 1171.2230724279.

The spelling of 1606641044 in words is "one billion, six hundred six million, six hundred forty-one thousand, forty-four".