1835123018881 has 2 divisors, whose sum is σ = 1835123018882. Its totient is φ = 1835123018880.

The previous prime is 1835123018857. The next prime is 1835123018921. The reversal of 1835123018881 is 1888103215381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1280425770481 + 554697248400 = 1131559^2 + 744780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1835123018881 - 2¹³ = 1835123010689 is a prime.

It is a super-2 number, since 2×1835123018881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1835123018831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 917561509440 + 917561509441.

It is an arithmetic number, because the mean of its divisors is an integer number (917561509441).

Almost surely, 2^{1835123018881} is an apocalyptic number.

It is an amenable number.

1835123018881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1835123018881 is an equidigital number, since it uses as much as digits as its factorization.

1835123018881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 368640, while the sum is 49.

The spelling of 1835123018881 in words is "one trillion, eight hundred thirty-five billion, one hundred twenty-three million, eighteen thousand, eight hundred eighty-one".