80560819 has 4 divisors (see below), whose sum is σ = 80596800. Its totient is φ = 80524840.

The previous prime is 80560763. The next prime is 80560849. The reversal of 80560819 is 91806508.

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

It is a cyclic number.

It is not a de Polignac number, because 80560819 - 2⁷ = 80560691 is a prime.

It is a super-2 number, since 2×80560819² = 12980091115901522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80560849) 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 3 ways as a sum of consecutive naturals, for example, 14392 + ... + 19189.

It is an arithmetic number, because the mean of its divisors is an integer number (20149200).

Almost surely, 2^80560819 is an apocalyptic number.

80560819 is the 4798-th nonagonal number.

80560819 is a deficient number, since it is larger than the sum of its proper divisors (35981).

80560819 is a wasteful number, since it uses less digits than its factorization.

80560819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35980.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 80560819 is about 8975.5678928968. The cubic root of 80560819 is about 431.8914675771.

The spelling of 80560819 in words is "eighty million, five hundred sixty thousand, eight hundred nineteen".