1680868535 has 8 divisors (see below), whose sum is σ = 2123202480. Its totient is φ = 1273921344.

The previous prime is 1680868529. The next prime is 1680868547. The reversal of 1680868535 is 5358680861.

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 1680868535 - 2⁶ = 1680868471 is a prime.

It is a congruent 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, 8846582 + ... + 8846771.

It is an arithmetic number, because the mean of its divisors is an integer number (265400310).

Almost surely, 2^1680868535 is an apocalyptic number.

1680868535 is a deficient number, since it is larger than the sum of its proper divisors (442333945).

1680868535 is a wasteful number, since it uses less digits than its factorization.

1680868535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17693377.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The square root of 1680868535 is about 40998.3967369457. The cubic root of 1680868535 is about 1188.9892165392.

The spelling of 1680868535 in words is "one billion, six hundred eighty million, eight hundred sixty-eight thousand, five hundred thirty-five".