80646244868 has 72 divisors (see below), whose sum is σ = 168067992960. Its totient is φ = 33750803520.

The previous prime is 80646244859. The next prime is 80646244873. The reversal of 80646244868 is 86844264608.

It is a super-2 number, since 2×80646244868² (a number of 23 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 1637621 + ... + 1686147.

It is an arithmetic number, because the mean of its divisors is an integer number (2334277680).

Almost surely, 2^80646244868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80646244868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84033996480).

80646244868 is an abundant number, since it is smaller than the sum of its proper divisors (87421748092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80646244868 is a wasteful number, since it uses less digits than its factorization.

80646244868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48745 (or 48736 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 56.

The spelling of 80646244868 in words is "eighty billion, six hundred forty-six million, two hundred forty-four thousand, eight hundred sixty-eight".