1809000360000 has 420 divisors, whose sum is σ = 6637480173324. Its totient is φ = 470630400000.

The previous prime is 1809000359983. The next prime is 1809000360031. The reversal of 1809000360000 is 630009081.

It can be written as a sum of positive squares in 10 ways, for example, as 1500762203136 + 308238156864 = 1225056^2 + 555192^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 14698720 + ... + 14821280.

Almost surely, 2^{1809000360000} is an apocalyptic number.

1809000360000 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 1809000360000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3318740086662).

1809000360000 is an abundant number, since it is smaller than the sum of its proper divisors (4828479813324).

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

1809000360000 is a wasteful number, since it uses less digits than its factorization.

1809000360000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122640 (or 122612 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

Adding to 1809000360000 its reverse (630009081), we get a palindrome (1809630369081).

The spelling of 1809000360000 in words is "one trillion, eight hundred nine billion, three hundred sixty thousand".