180228137728 has 72 divisors (see below), whose sum is σ = 364967482880. Its totient is φ = 88811873280.

The previous prime is 180228137659. The next prime is 180228137731. The reversal of 180228137728 is 827731822081.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11540101 + ... + 11555707.

Almost surely, 2^180228137728 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 180228137728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182483741440).

180228137728 is an abundant number, since it is smaller than the sum of its proper divisors (184739345152).

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

180228137728 is an equidigital number, since it uses as much as digits as its factorization.

180228137728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16273 (or 16259 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 49.

The spelling of 180228137728 in words is "one hundred eighty billion, two hundred twenty-eight million, one hundred thirty-seven thousand, seven hundred twenty-eight".