1889231466281 has 2 divisors, whose sum is σ = 1889231466282. Its totient is φ = 1889231466280.

The previous prime is 1889231466251. The next prime is 1889231466293. The reversal of 1889231466281 is 1826641329881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1250574760681 + 638656705600 = 1118291^2 + 799160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1889231466281 - 2⁶ = 1889231466217 is a prime.

It is a super-2 number, since 2×1889231466281² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1889231466281.

It is not a weakly prime, because it can be changed into another prime (1889231466251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944615733140 + 944615733141.

It is an arithmetic number, because the mean of its divisors is an integer number (944615733141).

Almost surely, 2^{1889231466281} is an apocalyptic number.

It is an amenable number.

1889231466281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889231466281 is an equidigital number, since it uses as much as digits as its factorization.

1889231466281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7962624, while the sum is 59.

The spelling of 1889231466281 in words is "one trillion, eight hundred eighty-nine billion, two hundred thirty-one million, four hundred sixty-six thousand, two hundred eighty-one".