135605511 has 12 divisors (see below), whose sum is σ = 196658280. Its totient is φ = 90042000.

The previous prime is 135605507. The next prime is 135605513. The reversal of 135605511 is 115506531.

135605511 is a `hidden beast` number, since 1 + 3 + 5 + 605 + 51 + 1 = 666.

It is not a de Polignac number, because 135605511 - 2² = 135605507 is a prime.

It is a super-2 number, since 2×135605511² = 36777709227142242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135605513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27756 + ... + 32273.

It is an arithmetic number, because the mean of its divisors is an integer number (16388190).

Almost surely, 2^135605511 is an apocalyptic number.

135605511 is a deficient number, since it is larger than the sum of its proper divisors (61052769).

135605511 is a wasteful number, since it uses less digits than its factorization.

135605511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60286 (or 60283 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 135605511 is about 11644.9779304213. The cubic root of 135605511 is about 513.7586099752.

The spelling of 135605511 in words is "one hundred thirty-five million, six hundred five thousand, five hundred eleven".