1664813144 has 16 divisors (see below), whose sum is σ = 3133397520. Its totient is φ = 829240480.

The previous prime is 1664813141. The next prime is 1664813149. The reversal of 1664813144 is 4413184661.

It is a junction number, because it is equal to n+sod(n) for n = 1664813098 and 1664813107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664813141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393527 + ... + 397734.

It is an arithmetic number, because the mean of its divisors is an integer number (195837345).

Almost surely, 2^1664813144 is an apocalyptic number.

It is an amenable number.

1664813144 is a deficient number, since it is larger than the sum of its proper divisors (1468584376).

1664813144 is a wasteful number, since it uses less digits than its factorization.

1664813144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791530 (or 791526 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 1664813144 is about 40802.1218075727. The cubic root of 1664813144 is about 1185.1914196401.

It can be divided in two parts, 16648 and 13144, that added together give a palindrome (29792).

The spelling of 1664813144 in words is "one billion, six hundred sixty-four million, eight hundred thirteen thousand, one hundred forty-four".