1680206116 has 6 divisors (see below), whose sum is σ = 2940360710. Its totient is φ = 840103056.

The previous prime is 1680206093. The next prime is 1680206137. The reversal of 1680206116 is 6116020861.

It can be written as a sum of positive squares in only one way, i.e., 904806400 + 775399716 = 30080^2 + 27846^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 210025761 + ... + 210025768.

Almost surely, 2^1680206116 is an apocalyptic number.

It is an amenable number.

1680206116 is a deficient number, since it is larger than the sum of its proper divisors (1260154594).

1680206116 is a wasteful number, since it uses less digits than its factorization.

1680206116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420051533 (or 420051531 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1680206116 is about 40990.3173444656. The cubic root of 1680206116 is about 1188.8330051287.

Adding to 1680206116 its reverse (6116020861), we get a palindrome (7796226977).

The spelling of 1680206116 in words is "one billion, six hundred eighty million, two hundred six thousand, one hundred sixteen".