1669789356 has 48 divisors (see below), whose sum is σ = 3997244160. Its totient is φ = 542329920.

The previous prime is 1669789337. The next prime is 1669789379. The reversal of 1669789356 is 6539879661.

It is a self number, because there is not a number n which added to its sum of digits gives 1669789356.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 67665 + ... + 88983.

It is an arithmetic number, because the mean of its divisors is an integer number (83275920).

Almost surely, 2^1669789356 is an apocalyptic number.

It is an amenable number.

1669789356 is an abundant number, since it is smaller than the sum of its proper divisors (2327454804).

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

1669789356 is a wasteful number, since it uses less digits than its factorization.

1669789356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21494 (or 21492 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 60.

The square root of 1669789356 is about 40863.0561265307. The cubic root of 1669789356 is about 1186.3711110437.

The spelling of 1669789356 in words is "one billion, six hundred sixty-nine million, seven hundred eighty-nine thousand, three hundred fifty-six".