80545865 has 8 divisors (see below), whose sum is σ = 96817920. Its totient is φ = 64328112.

The previous prime is 80545819. The next prime is 80545873. The reversal of 80545865 is 56854508.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80545865 is a prime.

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, 10235 + ... + 16304.

It is an arithmetic number, because the mean of its divisors is an integer number (12102240).

Almost surely, 2^80545865 is an apocalyptic number.

It is an amenable number.

80545865 is a deficient number, since it is larger than the sum of its proper divisors (16272055).

80545865 is a wasteful number, since it uses less digits than its factorization.

80545865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27151.

The product of its (nonzero) digits is 192000, while the sum is 41.

The square root of 80545865 is about 8974.7348150238. The cubic root of 80545865 is about 431.8647428212.

The spelling of 80545865 in words is "eighty million, five hundred forty-five thousand, eight hundred sixty-five".