1804890145444 has 27 divisors (see below), whose sum is σ = 3204009711553. Its totient is φ = 889640536400.

The previous prime is 1804890145433. The next prime is 1804890145451. The reversal of 1804890145444 is 4445410984081.

The square root of 1804890145444 is 1343462.

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

It can be written as a sum of positive squares in only one way, i.e., 1359467385444 + 445422760000 = 1165962^2 + 667400^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1804890145391 and 1804890145400.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 190766874 + ... + 190776334.

Almost surely, 2^{1804890145444} is an apocalyptic number.

1804890145444 is the 1343462-nd square number.

It is an amenable number.

1804890145444 is a deficient number, since it is larger than the sum of its proper divisors (1399119566109).

1804890145444 is an frugal number, since it uses more digits than its factorization.

1804890145444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19068 (or 9534 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 52.

The spelling of 1804890145444 in words is "one trillion, eight hundred four billion, eight hundred ninety million, one hundred forty-five thousand, four hundred forty-four".