1821443604480 has 1200 divisors, whose sum is σ = 7046445311136. Its totient is φ = 448454983680.

The previous prime is 1821443604467. The next prime is 1821443604523. The reversal of 1821443604480 is 844063441281.

1821443604480 is a `hidden beast` number, since 1 + 8 + 2 + 144 + 3 + 60 + 448 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7557857160 + ... + 7557857400.

Almost surely, 2^{1821443604480} is an apocalyptic number.

1821443604480 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 1821443604480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3523222655568).

1821443604480 is an abundant number, since it is smaller than the sum of its proper divisors (5225001706656).

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

1821443604480 is an equidigital number, since it uses as much as digits as its factorization.

1821443604480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The spelling of 1821443604480 in words is "one trillion, eight hundred twenty-one billion, four hundred forty-three million, six hundred four thousand, four hundred eighty".