1680535585 has 8 divisors (see below), whose sum is σ = 2016962856. Its totient is φ = 1344215040.

The previous prime is 1680535553. The next prime is 1680535603. The reversal of 1680535585 is 5855350861.

It can be written as a sum of positive squares in 4 ways, for example, as 929296 + 1679606289 = 964^2 + 40983^2 .

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

It is not a de Polignac number, because 1680535585 - 2⁵ = 1680535553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13455 + ... + 59515.

It is an arithmetic number, because the mean of its divisors is an integer number (252120357).

Almost surely, 2^1680535585 is an apocalyptic number.

It is an amenable number.

1680535585 is a deficient number, since it is larger than the sum of its proper divisors (336427271).

1680535585 is an equidigital number, since it uses as much as digits as its factorization.

1680535585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53363.

The product of its (nonzero) digits is 720000, while the sum is 46.

The square root of 1680535585 is about 40994.3360112101. The cubic root of 1680535585 is about 1188.9107055209.

The spelling of 1680535585 in words is "one billion, six hundred eighty million, five hundred thirty-five thousand, five hundred eighty-five".