1889408540441 has 2 divisors, whose sum is σ = 1889408540442. Its totient is φ = 1889408540440.

The previous prime is 1889408540389. The next prime is 1889408540449. The reversal of 1889408540441 is 1440458049881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123538520841 + 765870019600 = 1059971^2 + 875140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1889408540441 - 2³⁰ = 1888334798617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1889408540449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944704270220 + 944704270221.

It is an arithmetic number, because the mean of its divisors is an integer number (944704270221).

Almost surely, 2^{1889408540441} is an apocalyptic number.

It is an amenable number.

1889408540441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889408540441 is an equidigital number, since it uses as much as digits as its factorization.

1889408540441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5898240, while the sum is 56.

The spelling of 1889408540441 in words is "one trillion, eight hundred eighty-nine billion, four hundred eight million, five hundred forty thousand, four hundred forty-one".