1681712465 has 8 divisors (see below), whose sum is σ = 2087643240. Its totient is φ = 1298977792.

The previous prime is 1681712447. The next prime is 1681712467. The reversal of 1681712465 is 5642171861.

It can be written as a sum of positive squares in 4 ways, for example, as 44943616 + 1636768849 = 6704^2 + 40457^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1681712465 - 2¹⁰ = 1681711441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1681712467) 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, 5798864 + ... + 5799153.

It is an arithmetic number, because the mean of its divisors is an integer number (260955405).

Almost surely, 2^1681712465 is an apocalyptic number.

It is an amenable number.

1681712465 is a deficient number, since it is larger than the sum of its proper divisors (405930775).

1681712465 is a wasteful number, since it uses less digits than its factorization.

1681712465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11598051.

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

The square root of 1681712465 is about 41008.6876771252. The cubic root of 1681712465 is about 1189.1881723692.

The spelling of 1681712465 in words is "one billion, six hundred eighty-one million, seven hundred twelve thousand, four hundred sixty-five".