80811233065 has 16 divisors (see below), whose sum is σ = 102692853648. Its totient is φ = 60837185536.

The previous prime is 80811233011. The next prime is 80811233071. The reversal of 80811233065 is 56033211808.

It can be written as a sum of positive squares in 8 ways, for example, as 7495923241 + 73315309824 = 86579^2 + 270768^2 .

It is a cyclic number.

It is not a de Polignac number, because 80811233065 - 2⁷ = 80811232937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545319 + ... + 677491.

It is an arithmetic number, because the mean of its divisors is an integer number (6418303353).

Almost surely, 2^80811233065 is an apocalyptic number.

80811233065 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80811233065 is a deficient number, since it is larger than the sum of its proper divisors (21881620583).

80811233065 is a wasteful number, since it uses less digits than its factorization.

80811233065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139388.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 80811233065 in words is "eighty billion, eight hundred eleven million, two hundred thirty-three thousand, sixty-five".