136203630205 has 4 divisors (see below), whose sum is σ = 163444356252. Its totient is φ = 108962904160.

The previous prime is 136203630203. The next prime is 136203630209. The reversal of 136203630205 is 502036302631.

It is a happy number.

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 50390372484 + 85813257721 = 224478^2 + 292939^2 .

It is not a de Polignac number, because 136203630205 - 2¹ = 136203630203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136203630203) 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, 13620363016 + ... + 13620363025.

It is an arithmetic number, because the mean of its divisors is an integer number (40861089063).

Almost surely, 2^136203630205 is an apocalyptic number.

It is an amenable number.

136203630205 is a deficient number, since it is larger than the sum of its proper divisors (27240726047).

136203630205 is an equidigital number, since it uses as much as digits as its factorization.

136203630205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27240726046.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 136203630205 its reverse (502036302631), we get a palindrome (638239932836).

The spelling of 136203630205 in words is "one hundred thirty-six billion, two hundred three million, six hundred thirty thousand, two hundred five".