80640885536 has 24 divisors (see below), whose sum is σ = 158859786204. Its totient is φ = 40295543040.

The previous prime is 80640885491. The next prime is 80640885571. The reversal of 80640885536 is 63558804608.

It can be written as a sum of positive squares in 2 ways, for example, as 80281555600 + 359329936 = 283340^2 + 18956^2 .

It is an unprimeable number.

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, 725435 + ... + 829178.

Almost surely, 2^80640885536 is an apocalyptic number.

It is an amenable number.

80640885536 is a deficient number, since it is larger than the sum of its proper divisors (78218900668).

80640885536 is a wasteful number, since it uses less digits than its factorization.

80640885536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556244 (or 1556236 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 53.

The spelling of 80640885536 in words is "eighty billion, six hundred forty million, eight hundred eighty-five thousand, five hundred thirty-six".