1800529218244 has 9 divisors (see below), whose sum is σ = 3150930828367. Its totient is φ = 900263267284.

The previous prime is 1800529218221. The next prime is 1800529218247. The reversal of 1800529218244 is 4428129250081.

It is a happy number.

The square root of 1800529218244 is 1341838.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1800529218194 and 1800529218203.

It is not an unprimeable number, because it can be changed into a prime (1800529218247) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2348217 + ... + 3019135.

Almost surely, 2^{1800529218244} is an apocalyptic number.

1800529218244 is the 1341838-th square number.

It is an amenable number.

1800529218244 is a deficient number, since it is larger than the sum of its proper divisors (1350401610123).

1800529218244 is an frugal number, since it uses more digits than its factorization.

1800529218244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341842 (or 670921 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The spelling of 1800529218244 in words is "one trillion, eight hundred billion, five hundred twenty-nine million, two hundred eighteen thousand, two hundred forty-four".