80845491 has 4 divisors (see below), whose sum is σ = 107793992. Its totient is φ = 53896992.

The previous prime is 80845487. The next prime is 80845507. The reversal of 80845491 is 19454808.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 80845491 - 2² = 80845487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80845291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13474246 + ... + 13474251.

It is an arithmetic number, because the mean of its divisors is an integer number (26948498).

Almost surely, 2^80845491 is an apocalyptic number.

80845491 is a deficient number, since it is larger than the sum of its proper divisors (26948501).

80845491 is a wasteful number, since it uses less digits than its factorization.

80845491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26948500.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 80845491 is about 8991.4120693026. The cubic root of 80845491 is about 432.3995842033.

The spelling of 80845491 in words is "eighty million, eight hundred forty-five thousand, four hundred ninety-one".