1680081608 has 8 divisors (see below), whose sum is σ = 3150153030. Its totient is φ = 840040800.

The previous prime is 1680081583. The next prime is 1680081643. The reversal of 1680081608 is 8061800861.

It can be written as a sum of positive squares in only one way, i.e., 918211204 + 761870404 = 30302^2 + 27602^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105005093 + ... + 105005108.

Almost surely, 2^1680081608 is an apocalyptic number.

It is an amenable number.

1680081608 is a deficient number, since it is larger than the sum of its proper divisors (1470071422).

1680081608 is a wasteful number, since it uses less digits than its factorization.

1680081608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210010207 (or 210010203 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 1680081608 is about 40988.7985674135. The cubic root of 1680081608 is about 1188.8036391133.

The spelling of 1680081608 in words is "one billion, six hundred eighty million, eighty-one thousand, six hundred eight".