135863224561 has 2 divisors, whose sum is σ = 135863224562. Its totient is φ = 135863224560.

The previous prime is 135863224531. The next prime is 135863224577. The reversal of 135863224561 is 165422368531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111385057536 + 24478167025 = 333744^2 + 156455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135863224561 is a prime.

It is a super-2 number, since 2×135863224561² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135863224501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67931612280 + 67931612281.

It is an arithmetic number, because the mean of its divisors is an integer number (67931612281).

Almost surely, 2^135863224561 is an apocalyptic number.

It is an amenable number.

135863224561 is a deficient number, since it is larger than the sum of its proper divisors (1).

135863224561 is an equidigital number, since it uses as much as digits as its factorization.

135863224561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 46.

The spelling of 135863224561 in words is "one hundred thirty-five billion, eight hundred sixty-three million, two hundred twenty-four thousand, five hundred sixty-one".