1680800756 has 6 divisors (see below), whose sum is σ = 2941401330. Its totient is φ = 840400376.

The previous prime is 1680800753. The next prime is 1680800773. The reversal of 1680800756 is 6570080861.

It can be written as a sum of positive squares in only one way, i.e., 1578790756 + 102010000 = 39734^2 + 10100^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680800753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210100091 + ... + 210100098.

It is an arithmetic number, because the mean of its divisors is an integer number (490233555).

Almost surely, 2^1680800756 is an apocalyptic number.

It is an amenable number.

1680800756 is a deficient number, since it is larger than the sum of its proper divisors (1260600574).

1680800756 is a wasteful number, since it uses less digits than its factorization.

1680800756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420200193 (or 420200191 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1680800756 is about 40997.5701231183. The cubic root of 1680800756 is about 1188.9732348049.

The spelling of 1680800756 in words is "one billion, six hundred eighty million, eight hundred thousand, seven hundred fifty-six".