136139642329 has 4 divisors (see below), whose sum is σ = 137133362484. Its totient is φ = 135145922176.

The previous prime is 136139642297. The next prime is 136139642333. The reversal of 136139642329 is 923246931631.

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 81464576400 + 54675065929 = 285420^2 + 233827^2 .

It is a cyclic number.

It is not a de Polignac number, because 136139642329 - 2⁵ = 136139642297 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136139642339) 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, 496859872 + ... + 496860145.

It is an arithmetic number, because the mean of its divisors is an integer number (34283340621).

Almost surely, 2^136139642329 is an apocalyptic number.

It is an amenable number.

136139642329 is a deficient number, since it is larger than the sum of its proper divisors (993720155).

136139642329 is an equidigital number, since it uses as much as digits as its factorization.

136139642329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993720154.

The product of its digits is 1259712, while the sum is 49.

The spelling of 136139642329 in words is "one hundred thirty-six billion, one hundred thirty-nine million, six hundred forty-two thousand, three hundred twenty-nine".