1806520320000 has 1680 divisors, whose sum is σ = 7440397541115. Its totient is φ = 437944320000.

The previous prime is 1806520319983. The next prime is 1806520320013. The reversal of 1806520320000 is 230256081.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1806520320000 is a `hidden beast` number, since 1 + 8 + 0 + 652 + 0 + 3 + 2 + 0 + 0 + 0 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 417667497984 + 1388852822016 = 646272^2 + 1178496^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=950400.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 104 ways as a sum of consecutive naturals, for example, 164229119995 + ... + 164229120005.

Almost surely, 2^{1806520320000} is an apocalyptic number.

1806520320000 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 1806520320000

1806520320000 is an abundant number, since it is smaller than the sum of its proper divisors (5633877221115).

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

1806520320000 is an frugal number, since it uses more digits than its factorization.

1806520320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 1806520320000 its reverse (230256081), we get a palindrome (1806750576081).

The spelling of 1806520320000 in words is "one trillion, eight hundred six billion, five hundred twenty million, three hundred twenty thousand".