136686821041 has 4 divisors (see below), whose sum is σ = 136693012212. Its totient is φ = 136680629872.

The previous prime is 136686820999. The next prime is 136686821057. The reversal of 136686821041 is 140128686631.

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 109789509025 + 26897312016 = 331345^2 + 164004^2 .

It is a cyclic number.

It is not a de Polignac number, because 136686821041 - 2¹¹ = 136686818993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136686820982 and 136686821000.

It is not an unprimeable number, because it can be changed into a prime (136686821071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3062350 + ... + 3106663.

It is an arithmetic number, because the mean of its divisors is an integer number (34173253053).

Almost surely, 2^136686821041 is an apocalyptic number.

It is an amenable number.

136686821041 is a deficient number, since it is larger than the sum of its proper divisors (6191171).

136686821041 is an equidigital number, since it uses as much as digits as its factorization.

136686821041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6191170.

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 136686821041 in words is "one hundred thirty-six billion, six hundred eighty-six million, eight hundred twenty-one thousand, forty-one".