136638005 has 16 divisors (see below), whose sum is σ = 189765120. Its totient is φ = 92506752.

The previous prime is 136637947. The next prime is 136638013. The reversal of 136638005 is 500836631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136638005 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 21944 + ... + 27473.

It is an arithmetic number, because the mean of its divisors is an integer number (11860320).

Almost surely, 2^136638005 is an apocalyptic number.

It is an amenable number.

136638005 is a deficient number, since it is larger than the sum of its proper divisors (53127115).

136638005 is an equidigital number, since it uses as much as digits as its factorization.

136638005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49508.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 136638005 is about 11689.2260222822. The cubic root of 136638005 is about 515.0592259156.

The spelling of 136638005 in words is "one hundred thirty-six million, six hundred thirty-eight thousand, five".