135352685581 has 2 divisors, whose sum is σ = 135352685582. Its totient is φ = 135352685580.

The previous prime is 135352685561. The next prime is 135352685591. The reversal of 135352685581 is 185586253531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112872481225 + 22480204356 = 335965^2 + 149934^2 .

It is a cyclic number.

It is not a de Polignac number, because 135352685581 - 2⁵ = 135352685549 is a prime.

It is a super-2 number, since 2×135352685581² (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 (135352685561) 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, 67676342790 + 67676342791.

It is an arithmetic number, because the mean of its divisors is an integer number (67676342791).

Almost surely, 2^135352685581 is an apocalyptic number.

It is an amenable number.

135352685581 is a deficient number, since it is larger than the sum of its proper divisors (1).

135352685581 is an equidigital number, since it uses as much as digits as its factorization.

135352685581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320000, while the sum is 52.

The spelling of 135352685581 in words is "one hundred thirty-five billion, three hundred fifty-two million, six hundred eighty-five thousand, five hundred eighty-one".