1669144544 has 24 divisors (see below), whose sum is σ = 3293285688. Its totient is φ = 832754560.

The previous prime is 1669144517. The next prime is 1669144559. The reversal of 1669144544 is 4454419661.

It is a junction number, because it is equal to n+sod(n) for n = 1669144495 and 1669144504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41822 + ... + 71325.

It is an arithmetic number, because the mean of its divisors is an integer number (137220237).

Almost surely, 2^1669144544 is an apocalyptic number.

It is an amenable number.

1669144544 is a deficient number, since it is larger than the sum of its proper divisors (1624141144).

1669144544 is a wasteful number, since it uses less digits than its factorization.

1669144544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113618 (or 113610 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The square root of 1669144544 is about 40855.1654506502. The cubic root of 1669144544 is about 1186.2183802383.

The spelling of 1669144544 in words is "one billion, six hundred sixty-nine million, one hundred forty-four thousand, five hundred forty-four".