136243551233 has 4 divisors (see below), whose sum is σ = 137493492180. Its totient is φ = 134993610288.

The previous prime is 136243551229. The next prime is 136243551251. The reversal of 136243551233 is 332155342631.

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 60649897984 + 75593653249 = 246272^2 + 274943^2 .

It is a cyclic number.

It is not a de Polignac number, because 136243551233 - 2² = 136243551229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136243551733) 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, 624970310 + ... + 624970527.

It is an arithmetic number, because the mean of its divisors is an integer number (34373373045).

Almost surely, 2^136243551233 is an apocalyptic number.

It is an amenable number.

136243551233 is a deficient number, since it is larger than the sum of its proper divisors (1249940947).

136243551233 is a wasteful number, since it uses less digits than its factorization.

136243551233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249940946.

The product of its digits is 194400, while the sum is 38.

Adding to 136243551233 its reverse (332155342631), we get a palindrome (468398893864).

The spelling of 136243551233 in words is "one hundred thirty-six billion, two hundred forty-three million, five hundred fifty-one thousand, two hundred thirty-three".