80845681 has 8 divisors (see below), whose sum is σ = 92582784. Its totient is φ = 69155520.

The previous prime is 80845673. The next prime is 80845691. The reversal of 80845681 is 18654808.

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

It is not a de Polignac number, because 80845681 - 2³ = 80845673 is a prime.

It is a super-2 number, since 2×80845681² = 13072048272707522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80845601) 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, 7960 + ... + 15001.

It is an arithmetic number, because the mean of its divisors is an integer number (11572848).

Almost surely, 2^80845681 is an apocalyptic number.

It is an amenable number.

80845681 is a deficient number, since it is larger than the sum of its proper divisors (11737103).

80845681 is a wasteful number, since it uses less digits than its factorization.

80845681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23471.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 80845681 is about 8991.4226349338. The cubic root of 80845681 is about 432.3999229394.

The spelling of 80845681 in words is "eighty million, eight hundred forty-five thousand, six hundred eighty-one".