1680285556 has 12 divisors (see below), whose sum is σ = 2969048992. Its totient is φ = 831985848.

The previous prime is 1680285533. The next prime is 1680285571. The reversal of 1680285556 is 6555820861.

It is a happy number.

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, 2038770 + ... + 2039593.

Almost surely, 2^1680285556 is an apocalyptic number.

It is an amenable number.

1680285556 is a deficient number, since it is larger than the sum of its proper divisors (1288763436).

1680285556 is a wasteful number, since it uses less digits than its factorization.

1680285556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078470 (or 4078468 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 46.

The square root of 1680285556 is about 40991.2863423435. The cubic root of 1680285556 is about 1188.8517408074.

The spelling of 1680285556 in words is "one billion, six hundred eighty million, two hundred eighty-five thousand, five hundred fifty-six".