80844717720 has 128 divisors (see below), whose sum is σ = 269616291840. Its totient is φ = 19258283520.

The previous prime is 80844717713. The next prime is 80844717743. The reversal of 80844717720 is 2771744808.

It is a self number, because there is not a number n which added to its sum of digits gives 80844717720.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 787504 + ... + 884223.

It is an arithmetic number, because the mean of its divisors is an integer number (2106377280).

Almost surely, 2^80844717720 is an apocalyptic number.

It is an amenable number.

80844717720 is an abundant number, since it is smaller than the sum of its proper divisors (188771574120).

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

80844717720 is a wasteful number, since it uses less digits than its factorization.

80844717720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671785 (or 1671781 counting only the distinct ones).

The product of its (nonzero) digits is 702464, while the sum is 48.

The spelling of 80844717720 in words is "eighty billion, eight hundred forty-four million, seven hundred seventeen thousand, seven hundred twenty".