1804854203249 has 2 divisors, whose sum is σ = 1804854203250. Its totient is φ = 1804854203248.

The previous prime is 1804854203227. The next prime is 1804854203303. The reversal of 1804854203249 is 9423024584081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1704507802624 + 100346400625 = 1305568^2 + 316775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1804854203249 - 2⁸ = 1804854202993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1804854203197 and 1804854203206.

It is not a weakly prime, because it can be changed into another prime (1804854203149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902427101624 + 902427101625.

It is an arithmetic number, because the mean of its divisors is an integer number (902427101625).

Almost surely, 2^{1804854203249} is an apocalyptic number.

It is an amenable number.

1804854203249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1804854203249 is an equidigital number, since it uses as much as digits as its factorization.

1804854203249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2211840, while the sum is 50.

The spelling of 1804854203249 in words is "one trillion, eight hundred four billion, eight hundred fifty-four million, two hundred three thousand, two hundred forty-nine".