136506505 has 8 divisors (see below), whose sum is σ = 168235272. Its totient is φ = 106253568.

The previous prime is 136506493. The next prime is 136506521. The reversal of 136506505 is 505605631.

It can be written as a sum of positive squares in 4 ways, for example, as 67765824 + 68740681 = 8232^2 + 8291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136506505 - 2⁵ = 136506473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 368752 + ... + 369121.

It is an arithmetic number, because the mean of its divisors is an integer number (21029409).

Almost surely, 2^136506505 is an apocalyptic number.

It is an amenable number.

136506505 is a deficient number, since it is larger than the sum of its proper divisors (31728767).

136506505 is an equidigital number, since it uses as much as digits as its factorization.

136506505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737915.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 136506505 is about 11683.5998305317. The cubic root of 136506505 is about 514.8939424045.

The spelling of 136506505 in words is "one hundred thirty-six million, five hundred six thousand, five hundred five".