1680240009 has 8 divisors (see below), whose sum is σ = 2560365760. Its totient is φ = 960137136.

The previous prime is 1680239971. The next prime is 1680240013. The reversal of 1680240009 is 9000420861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1680240009 - 2⁷ = 1680239881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680242009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40005694 + ... + 40005735.

It is an arithmetic number, because the mean of its divisors is an integer number (320045720).

Almost surely, 2^1680240009 is an apocalyptic number.

It is an amenable number.

1680240009 is a deficient number, since it is larger than the sum of its proper divisors (880125751).

1680240009 is an equidigital number, since it uses as much as digits as its factorization.

1680240009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80011439.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1680240009 is about 40990.7307692849. The cubic root of 1680240009 is about 1188.8409987603.

The spelling of 1680240009 in words is "one billion, six hundred eighty million, two hundred forty thousand, nine".