135523665 has 16 divisors (see below), whose sum is σ = 240931200. Its totient is φ = 72279216.

The previous prime is 135523657. The next prime is 135523667. The reversal of 135523665 is 566325531.

135523665 is a `hidden beast` number, since 13 + 552 + 36 + 65 = 666.

It is not a de Polignac number, because 135523665 - 2³ = 135523657 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (135523667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501805 + ... + 502074.

It is an arithmetic number, because the mean of its divisors is an integer number (15058200).

Almost surely, 2^135523665 is an apocalyptic number.

135523665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135523665 is a deficient number, since it is larger than the sum of its proper divisors (105407535).

135523665 is a wasteful number, since it uses less digits than its factorization.

135523665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003893 (or 1003887 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 135523665 is about 11641.4631812328. The cubic root of 135523665 is about 513.6552278697.

The spelling of 135523665 in words is "one hundred thirty-five million, five hundred twenty-three thousand, six hundred sixty-five".