1235478113489 has 2 divisors, whose sum is σ = 1235478113490. Its totient is φ = 1235478113488.

The previous prime is 1235478113393. The next prime is 1235478113509. The reversal of 1235478113489 is 9843118745321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1082140867600 + 153337245889 = 1040260^2 + 391583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1235478113489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1235478143489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617739056744 + 617739056745.

It is an arithmetic number, because the mean of its divisors is an integer number (617739056745).

Almost surely, 2^{1235478113489} is an apocalyptic number.

It is an amenable number.

1235478113489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235478113489 is an equidigital number, since it uses as much as digits as its factorization.

1235478113489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 56.

The spelling of 1235478113489 in words is "one trillion, two hundred thirty-five billion, four hundred seventy-eight million, one hundred thirteen thousand, four hundred eighty-nine".