80820389520 has 320 divisors, whose sum is σ = 317432183040. Its totient is φ = 18723889152.

The previous prime is 80820389473. The next prime is 80820389543. The reversal of 80820389520 is 2598302808.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 392707 + ... + 562013.

It is an arithmetic number, because the mean of its divisors is an integer number (991975572).

Almost surely, 2^80820389520 is an apocalyptic number.

80820389520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80820389520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158716091520).

80820389520 is an abundant number, since it is smaller than the sum of its proper divisors (236611793520).

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

80820389520 is a wasteful number, since it uses less digits than its factorization.

80820389520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169359 (or 169347 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 80820389520 in words is "eighty billion, eight hundred twenty million, three hundred eighty-nine thousand, five hundred twenty".