80549565797 has 4 divisors (see below), whose sum is σ = 80554007136. Its totient is φ = 80545124460.

The previous prime is 80549565793. The next prime is 80549565799. The reversal of 80549565797 is 79756594508.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80549565797 - 2² = 80549565793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80549565791) 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, 2193353 + ... + 2229774.

It is an arithmetic number, because the mean of its divisors is an integer number (20138501784).

Almost surely, 2^80549565797 is an apocalyptic number.

It is an amenable number.

80549565797 is a deficient number, since it is larger than the sum of its proper divisors (4441339).

80549565797 is a wasteful number, since it uses less digits than its factorization.

80549565797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441338.

The product of its (nonzero) digits is 95256000, while the sum is 65.

The spelling of 80549565797 in words is "eighty billion, five hundred forty-nine million, five hundred sixty-five thousand, seven hundred ninety-seven".