1680889616 has 20 divisors (see below), whose sum is σ = 3721970112. Its totient is φ = 720381216.

The previous prime is 1680889601. The next prime is 1680889621. The reversal of 1680889616 is 6169880861.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7503860 + ... + 7504083.

Almost surely, 2^1680889616 is an apocalyptic number.

1680889616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1680889616 is an abundant number, since it is smaller than the sum of its proper divisors (2041080496).

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

1680889616 is a wasteful number, since it uses less digits than its factorization.

1680889616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15007958 (or 15007952 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 1680889616 is about 40998.6538315589. The cubic root of 1680889616 is about 1188.9941871792.

The spelling of 1680889616 in words is "one billion, six hundred eighty million, eight hundred eighty-nine thousand, six hundred sixteen".