80523644544 has 192 divisors, whose sum is σ = 269815328640. Its totient is φ = 22572546048.

The previous prime is 80523644543. The next prime is 80523644557. The reversal of 80523644544 is 44544632508.

80523644544 is a `hidden beast` number, since 80 + 5 + 23 + 6 + 4 + 4 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a self number, because there is not a number n which added to its sum of digits gives 80523644544.

It is not an unprimeable number, because it can be changed into a prime (80523644543) 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, 333189 + ... + 521595.

It is an arithmetic number, because the mean of its divisors is an integer number (1405288170).

Almost surely, 2^80523644544 is an apocalyptic number.

80523644544 is a gapful number since it is divisible by the number (84) 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 80523644544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134907664320).

80523644544 is an abundant number, since it is smaller than the sum of its proper divisors (189291684096).

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

80523644544 is a wasteful number, since it uses less digits than its factorization.

80523644544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188487 (or 188472 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 45.

The spelling of 80523644544 in words is "eighty billion, five hundred twenty-three million, six hundred forty-four thousand, five hundred forty-four".