1804059518549 has 2 divisors, whose sum is σ = 1804059518550. Its totient is φ = 1804059518548.

The previous prime is 1804059518507. The next prime is 1804059518603. The reversal of 1804059518549 is 9458159504081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1789534930225 + 14524588324 = 1337735^2 + 120518^2 .

It is a cyclic number.

It is not a de Polignac number, because 1804059518549 - 2⁴⁰ = 704547890773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1804059508549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902029759274 + 902029759275.

It is an arithmetic number, because the mean of its divisors is an integer number (902029759275).

Almost surely, 2^{1804059518549} is an apocalyptic number.

It is an amenable number.

1804059518549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1804059518549 is an equidigital number, since it uses as much as digits as its factorization.

1804059518549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368000, while the sum is 59.

The spelling of 1804059518549 in words is "one trillion, eight hundred four billion, fifty-nine million, five hundred eighteen thousand, five hundred forty-nine".