1680546737 has 12 divisors (see below), whose sum is σ = 1741959540. Its totient is φ = 1620713952.

The previous prime is 1680546709. The next prime is 1680546779. The reversal of 1680546737 is 7376450861.

It can be written as a sum of positive squares in 2 ways, for example, as 661724176 + 1018822561 = 25724^2 + 31919^2 .

It is not a de Polignac number, because 1680546737 - 2¹⁴ = 1680530353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1680546691 and 1680546700.

It is not an unprimeable number, because it can be changed into a prime (1680546787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179939 + ... + 189047.

It is an arithmetic number, because the mean of its divisors is an integer number (145163295).

Almost surely, 2^1680546737 is an apocalyptic number.

It is an amenable number.

1680546737 is a deficient number, since it is larger than the sum of its proper divisors (61412803).

1680546737 is an frugal number, since it uses more digits than its factorization.

1680546737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280 (or 9221 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 1680546737 is about 40994.4720297749. The cubic root of 1680546737 is about 1188.9133353775.

The spelling of 1680546737 in words is "one billion, six hundred eighty million, five hundred forty-six thousand, seven hundred thirty-seven".