1143268685981 has 2 divisors, whose sum is σ = 1143268685982. Its totient is φ = 1143268685980.

The previous prime is 1143268685971. The next prime is 1143268685987. The reversal of 1143268685981 is 1895868623411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123875616900 + 19393069081 = 1060130^2 + 139259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143268685981 is a prime.

It is a super-2 number, since 2×1143268685981² (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 (1143268685987) 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, 571634342990 + 571634342991.

It is an arithmetic number, because the mean of its divisors is an integer number (571634342991).

Almost surely, 2^{1143268685981} is an apocalyptic number.

It is an amenable number.

1143268685981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143268685981 is an equidigital number, since it uses as much as digits as its factorization.

1143268685981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19906560, while the sum is 62.

The spelling of 1143268685981 in words is "one trillion, one hundred forty-three billion, two hundred sixty-eight million, six hundred eighty-five thousand, nine hundred eighty-one".