1669621048 has 32 divisors (see below), whose sum is σ = 3301189200. Its totient is φ = 789460992.

The previous prime is 1669621021. The next prime is 1669621049. The reversal of 1669621048 is 8401269661.

It is a junction number, because it is equal to n+sod(n) for n = 1669620995 and 1669621013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669621049) 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 7 ways as a sum of consecutive naturals, for example, 78186 + ... + 97222.

Almost surely, 2^1669621048 is an apocalyptic number.

It is an amenable number.

1669621048 is a deficient number, since it is larger than the sum of its proper divisors (1631568152).

1669621048 is a wasteful number, since it uses less digits than its factorization.

1669621048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19639 (or 19635 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1669621048 is about 40860.9966594061. The cubic root of 1669621048 is about 1186.3312492377.

The spelling of 1669621048 in words is "one billion, six hundred sixty-nine million, six hundred twenty-one thousand, forty-eight".