80401720872 has 96 divisors (see below), whose sum is σ = 221213643840. Its totient is φ = 24333830400.

The previous prime is 80401720849. The next prime is 80401720873. The reversal of 80401720872 is 27802710408.

It is a super-3 number, since 3×80401720872³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80401720872.

It is not an unprimeable number, because it can be changed into a prime (80401720873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2373172 + ... + 2406812.

It is an arithmetic number, because the mean of its divisors is an integer number (2304308790).

Almost surely, 2^80401720872 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 80401720872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110606821920).

80401720872 is an abundant number, since it is smaller than the sum of its proper divisors (140811922968).

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

80401720872 is a wasteful number, since it uses less digits than its factorization.

80401720872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34495 (or 34480 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 39.

The spelling of 80401720872 in words is "eighty billion, four hundred one million, seven hundred twenty thousand, eight hundred seventy-two".