80851681 has 8 divisors (see below), whose sum is σ = 84700800. Its totient is φ = 77073360.

The previous prime is 80851679. The next prime is 80851709. The reversal of 80851681 is 18615808.

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 80851681 - 2¹ = 80851679 is a prime.

It is a super-2 number, since 2×80851681² = 13073988641051522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80851681.

It is not an unprimeable number, because it can be changed into a prime (80851621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15355 + ... + 19936.

It is an arithmetic number, because the mean of its divisors is an integer number (10587600).

Almost surely, 2^80851681 is an apocalyptic number.

It is an amenable number.

80851681 is a deficient number, since it is larger than the sum of its proper divisors (3849119).

80851681 is a wasteful number, since it uses less digits than its factorization.

80851681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35399.

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 80851681 is about 8991.7562800601. The cubic root of 80851681 is about 432.4106195956.

The spelling of 80851681 in words is "eighty million, eight hundred fifty-one thousand, six hundred eighty-one".