180421814016 has 144 divisors (see below), whose sum is σ = 542286853920. Its totient is φ = 59154554880.

The previous prime is 180421813987. The next prime is 180421814021. The reversal of 180421814016 is 610418124081.

180421814016 is a `hidden beast` number, since 1 + 80 + 421 + 8 + 140 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207676 + ... + 635588.

It is an arithmetic number, because the mean of its divisors is an integer number (3765880930).

Almost surely, 2^180421814016 is an apocalyptic number.

180421814016 is a gapful number since it is divisible by the number (16) 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 180421814016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271143426960).

180421814016 is an abundant number, since it is smaller than the sum of its proper divisors (361865039904).

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

180421814016 is an equidigital number, since it uses as much as digits as its factorization.

180421814016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427999 (or 427979 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

Adding to 180421814016 its reverse (610418124081), we get a palindrome (790839938097).

The spelling of 180421814016 in words is "one hundred eighty billion, four hundred twenty-one million, eight hundred fourteen thousand, sixteen".