1680492565 has 8 divisors (see below), whose sum is σ = 2018648448. Its totient is φ = 1343022480.

The previous prime is 1680492557. The next prime is 1680492581. The reversal of 1680492565 is 5652940861.

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

It is not a de Polignac number, because 1680492565 - 2³ = 1680492557 is a prime.

It is a super-2 number, since 2×1680492565² = 5648110522040558450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166041 + ... + 175870.

It is an arithmetic number, because the mean of its divisors is an integer number (252331056).

Almost surely, 2^1680492565 is an apocalyptic number.

It is an amenable number.

1680492565 is a deficient number, since it is larger than the sum of its proper divisors (338155883).

1680492565 is an equidigital number, since it uses as much as digits as its factorization.

1680492565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342899.

The product of its (nonzero) digits is 518400, while the sum is 46.

The square root of 1680492565 is about 40993.8113012196. The cubic root of 1680492565 is about 1188.9005604665.

The spelling of 1680492565 in words is "one billion, six hundred eighty million, four hundred ninety-two thousand, five hundred sixty-five".