801568681 has 8 divisors (see below), whose sum is σ = 816897920. Its totient is φ = 786369168.

The previous prime is 801568679. The next prime is 801568687. The reversal of 801568681 is 186865108.

It is a happy number.

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 801568681 - 2¹ = 801568679 is a prime.

It is a super-3 number, since 3×801568681³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (801568687) 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, 19911 + ... + 44716.

It is an arithmetic number, because the mean of its divisors is an integer number (102112240).

Almost surely, 2^801568681 is an apocalyptic number.

It is an amenable number.

801568681 is a deficient number, since it is larger than the sum of its proper divisors (15329239).

801568681 is a wasteful number, since it uses less digits than its factorization.

801568681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64863.

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 801568681 is about 28311.9882911815. The cubic root of 801568681 is about 928.9241349136.

The spelling of 801568681 in words is "eight hundred one million, five hundred sixty-eight thousand, six hundred eighty-one".