1843661574225 has 81 divisors (see below), whose sum is σ = 3332425412667. Its totient is φ = 974368044000.

The previous prime is 1843661574193. The next prime is 1843661574269. The reversal of 1843661574225 is 5224751663481.

The square root of 1843661574225 is 1357815.

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

1843661574225 is a `hidden beast` number, since 1 + 8 + 4 + 3 + 6 + 61 + 574 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 663718166721 + 1179943407504 = 814689^2 + 1086252^2 .

It is not a de Polignac number, because 1843661574225 - 2⁵ = 1843661574193 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2668106130 + ... + 2668106820.

Almost surely, 2^{1843661574225} is an apocalyptic number.

1843661574225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1843661574225 is the 1357815-th square number.

1843661574225 is the 678908-th centered octagonal number.

It is an amenable number.

1843661574225 is a deficient number, since it is larger than the sum of its proper divisors (1488763838442).

1843661574225 is an frugal number, since it uses more digits than its factorization.

1843661574225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660 (or 830 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 1843661574225 in words is "one trillion, eight hundred forty-three billion, six hundred sixty-one million, five hundred seventy-four thousand, two hundred twenty-five".