136229666129 has 4 divisors (see below), whose sum is σ = 140624171520. Its totient is φ = 131835160740.

The previous prime is 136229666123. The next prime is 136229666143. The reversal of 136229666129 is 921666922631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136229666129 - 2¹² = 136229662033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136229666123) 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, 2197252649 + ... + 2197252710.

It is an arithmetic number, because the mean of its divisors is an integer number (35156042880).

Almost surely, 2^136229666129 is an apocalyptic number.

It is an amenable number.

136229666129 is a deficient number, since it is larger than the sum of its proper divisors (4394505391).

136229666129 is an equidigital number, since it uses as much as digits as its factorization.

136229666129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4394505390.

The product of its digits is 2519424, while the sum is 53.

The spelling of 136229666129 in words is "one hundred thirty-six billion, two hundred twenty-nine million, six hundred sixty-six thousand, one hundred twenty-nine".