180821927440 has 320 divisors, whose sum is σ = 548508464640. Its totient is φ = 53798584320.

The previous prime is 180821927423. The next prime is 180821927449. The reversal of 180821927440 is 44729128081.

It is not an unprimeable number, because it can be changed into a prime (180821927449) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12072276 + ... + 12087244.

It is an arithmetic number, because the mean of its divisors is an integer number (1714088952).

Almost surely, 2^180821927440 is an apocalyptic number.

180821927440 is a gapful number since it is divisible by the number (10) 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 180821927440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274254232320).

180821927440 is an abundant number, since it is smaller than the sum of its proper divisors (367686537200).

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

180821927440 is a wasteful number, since it uses less digits than its factorization.

180821927440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15090 (or 15084 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 46.

The spelling of 180821927440 in words is "one hundred eighty billion, eight hundred twenty-one million, nine hundred twenty-seven thousand, four hundred forty".