80865445243 has 16 divisors (see below), whose sum is σ = 89477885952. Its totient is φ = 72463608000.

The previous prime is 80865445237. The next prime is 80865445247. The reversal of 80865445243 is 34254456808.

It is a cyclic number.

It is not a de Polignac number, because 80865445243 - 2¹⁷ = 80865314171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80865445247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5710630 + ... + 5724772.

It is an arithmetic number, because the mean of its divisors is an integer number (5592367872).

Almost surely, 2^80865445243 is an apocalyptic number.

80865445243 is a deficient number, since it is larger than the sum of its proper divisors (8612440709).

80865445243 is a wasteful number, since it uses less digits than its factorization.

80865445243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21546.

The product of its (nonzero) digits is 3686400, while the sum is 49.

The spelling of 80865445243 in words is "eighty billion, eight hundred sixty-five million, four hundred forty-five thousand, two hundred forty-three".