135568912469 has 2 divisors, whose sum is σ = 135568912470. Its totient is φ = 135568912468.

The previous prime is 135568912447. The next prime is 135568912483. The reversal of 135568912469 is 964219865531.

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., 135543258244 + 25654225 = 368162^2 + 5065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135568912469 is a prime.

It is a super-2 number, since 2×135568912469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135568912069) 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, 67784456234 + 67784456235.

It is an arithmetic number, because the mean of its divisors is an integer number (67784456235).

Almost surely, 2^135568912469 is an apocalyptic number.

It is an amenable number.

135568912469 is a deficient number, since it is larger than the sum of its proper divisors (1).

135568912469 is an equidigital number, since it uses as much as digits as its factorization.

135568912469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13996800, while the sum is 59.

The spelling of 135568912469 in words is "one hundred thirty-five billion, five hundred sixty-eight million, nine hundred twelve thousand, four hundred sixty-nine".