135280545581 has 2 divisors, whose sum is σ = 135280545582. Its totient is φ = 135280545580.

The previous prime is 135280545563. The next prime is 135280545637. The reversal of 135280545581 is 185545082531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135280518025 + 27556 = 367805^2 + 166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135280545581 is a prime.

It is a super-2 number, since 2×135280545581² (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 (135280541581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67640272790 + 67640272791.

It is an arithmetic number, because the mean of its divisors is an integer number (67640272791).

Almost surely, 2^135280545581 is an apocalyptic number.

It is an amenable number.

135280545581 is a deficient number, since it is larger than the sum of its proper divisors (1).

135280545581 is an equidigital number, since it uses as much as digits as its factorization.

135280545581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960000, while the sum is 47.

The spelling of 135280545581 in words is "one hundred thirty-five billion, two hundred eighty million, five hundred forty-five thousand, five hundred eighty-one".