1848004385581 has 2 divisors, whose sum is σ = 1848004385582. Its totient is φ = 1848004385580.

The previous prime is 1848004385573. The next prime is 1848004385767. The reversal of 1848004385581 is 1855834008481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1838112292900 + 9892092681 = 1355770^2 + 99459^2 .

It is an emirp because it is prime and its reverse (1855834008481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1848004385581 - 2³ = 1848004385573 is a prime.

It is a super-2 number, since 2×1848004385581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1848004385081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 924002192790 + 924002192791.

It is an arithmetic number, because the mean of its divisors is an integer number (924002192791).

Almost surely, 2^{1848004385581} is an apocalyptic number.

It is an amenable number.

1848004385581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1848004385581 is an equidigital number, since it uses as much as digits as its factorization.

1848004385581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4915200, while the sum is 55.

The spelling of 1848004385581 in words is "one trillion, eight hundred forty-eight billion, four million, three hundred eighty-five thousand, five hundred eighty-one".