80238818309 has 24 divisors (see below), whose sum is σ = 88662533736. Its totient is φ = 72184665600.

The previous prime is 80238818293. The next prime is 80238818321. The reversal of 80238818309 is 90381883208.

It can be written as a sum of positive squares in 12 ways, for example, as 79286170084 + 952648225 = 281578^2 + 30865^2 .

It is not a de Polignac number, because 80238818309 - 2⁴ = 80238818293 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80238818369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40667447 + ... + 40669419.

It is an arithmetic number, because the mean of its divisors is an integer number (3694272239).

Almost surely, 2^80238818309 is an apocalyptic number.

It is an amenable number.

80238818309 is a deficient number, since it is larger than the sum of its proper divisors (8423715427).

80238818309 is a wasteful number, since it uses less digits than its factorization.

80238818309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3929 (or 3888 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 80238818309 in words is "eighty billion, two hundred thirty-eight million, eight hundred eighteen thousand, three hundred nine".