136643305864 has 16 divisors (see below), whose sum is σ = 275914367820. Its totient is φ = 63066141120.

The previous prime is 136643305861. The next prime is 136643305871. The reversal of 136643305864 is 468503346631.

It can be written as a sum of positive squares in 2 ways, for example, as 112924225764 + 23719080100 = 336042^2 + 154010^2 .

It is not an unprimeable number, because it can be changed into a prime (136643305861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656938867 + ... + 656939074.

Almost surely, 2^136643305864 is an apocalyptic number.

It is an amenable number.

136643305864 is an abundant number, since it is smaller than the sum of its proper divisors (139271061956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136643305864 is a wasteful number, since it uses less digits than its factorization.

136643305864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313877960 (or 1313877956 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 136643305864 in words is "one hundred thirty-six billion, six hundred forty-three million, three hundred five thousand, eight hundred sixty-four".