1181397243853 has 2 divisors, whose sum is σ = 1181397243854. Its totient is φ = 1181397243852.

The previous prime is 1181397243847. The next prime is 1181397243863. The reversal of 1181397243853 is 3583427931811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1101790314244 + 79606929609 = 1049662^2 + 282147^2 .

It is a cyclic number.

It is not a de Polignac number, because 1181397243853 - 2¹⁷ = 1181397112781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1181397243794 and 1181397243803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1181397243863) 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, 590698621926 + 590698621927.

It is an arithmetic number, because the mean of its divisors is an integer number (590698621927).

Almost surely, 2^{1181397243853} is an apocalyptic number.

It is an amenable number.

1181397243853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1181397243853 is an equidigital number, since it uses as much as digits as its factorization.

1181397243853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 55.

The spelling of 1181397243853 in words is "one trillion, one hundred eighty-one billion, three hundred ninety-seven million, two hundred forty-three thousand, eight hundred fifty-three".