80105945 has 8 divisors (see below), whose sum is σ = 96337536. Its totient is φ = 63944496.

The previous prime is 80105933. The next prime is 80105951. The reversal of 80105945 is 54950108.

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 80105945 - 2¹² = 80101849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 14987 + ... + 19616.

It is an arithmetic number, because the mean of its divisors is an integer number (12042192).

Almost surely, 2^80105945 is an apocalyptic number.

It is an amenable number.

80105945 is a deficient number, since it is larger than the sum of its proper divisors (16231591).

80105945 is a wasteful number, since it uses less digits than its factorization.

80105945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35071.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 80105945 is about 8950.1924560313. The cubic root of 80105945 is about 431.0770637551.

The spelling of 80105945 in words is "eighty million, one hundred five thousand, nine hundred forty-five".