136205124255205 has 16 divisors (see below), whose sum is σ = 167864006728944. Its totient is φ = 106018874818560.

The previous prime is 136205124255113. The next prime is 136205124255209. The reversal of 136205124255205 is 502552421502631.

It can be written as a sum of positive squares in 8 ways, for example, as 16086308079076 + 120118816176129 = 4010774^2 + 10959873^2 .

It is not a de Polignac number, because 136205124255205 - 2⁴³ = 127409031232997 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 (136205124255209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140175219 + ... + 141143551.

It is an arithmetic number, because the mean of its divisors is an integer number (10491500420559).

Almost surely, 2^{136205124255205} is an apocalyptic number.

It is an amenable number.

136205124255205 is a deficient number, since it is larger than the sum of its proper divisors (31658882473739).

136205124255205 is an equidigital number, since it uses as much as digits as its factorization.

136205124255205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728696.

The product of its (nonzero) digits is 720000, while the sum is 43.

Adding to 136205124255205 its reverse (502552421502631), we get a palindrome (638757545757836).

The spelling of 136205124255205 in words is "one hundred thirty-six trillion, two hundred five billion, one hundred twenty-four million, two hundred fifty-five thousand, two hundred five".