135136017608321 has 4 divisors (see below), whose sum is σ = 139795880284500. Its totient is φ = 130476154932144.

The previous prime is 135136017608261. The next prime is 135136017608323. The reversal of 135136017608321 is 123806710631531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109035781680400 + 26100235927921 = 10442020^2 + 5108839^2 .

It is a cyclic number.

It is not a de Polignac number, because 135136017608321 - 2²⁶ = 135135950499457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135136017608323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2329931338046 + ... + 2329931338103.

It is an arithmetic number, because the mean of its divisors is an integer number (34948970071125).

Almost surely, 2^{135136017608321} is an apocalyptic number.

It is an amenable number.

135136017608321 is a deficient number, since it is larger than the sum of its proper divisors (4659862676179).

135136017608321 is an equidigital number, since it uses as much as digits as its factorization.

135136017608321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4659862676178.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 135136017608321 in words is "one hundred thirty-five trillion, one hundred thirty-six billion, seventeen million, six hundred eight thousand, three hundred twenty-one".